The Eibach Pro-Plus Kit is a complete suspension tuning solution designed specifically for the 2018-2021 Kia Stinger GT. This package integrates Eibach's precision-engineered Pro-Kit lowering springs with their performance Anti-Roll-Kit front and rear stabilizer bars to provide a comprehensive handling upgrade. By lowering the vehicle's center of gravity and increasing roll stiffness, this system reduces body roll in corners and excessive nose-dive during hard braking.

Each component is designed to bolt directly to the factory mounting points without the need for permanent modifications. The result is a more responsive steering feel, improved turn-in, and a more aggressive stance without sacrificing daily drivability. Following installation, a standard wheel alignment is recommended to ensure optimal tire wear and handling characteristics.

• Fits 2018-2021 Kia Stinger GT models.
• Includes Pro-Kit lowering springs and front/rear Anti-Roll-Kit sway bars.
• Reduced body roll and improved cornering stability.
• Direct bolt-on installation using factory mounting points.
• Manufacturer Part Number: E43-46-035-01-22.

Fits select 2017-2023 Ford F-250 and F-350 Super Duty models.

Upgrade your truck’s handling and stance with the Roush Performance Suspension Kit. Engineered to meet the rigorous demands of the Ford Super Duty platform, this kit (MPN 422308) provides a more commanded presence while maintaining the ride quality and towing capabilities required for heavy-duty applications. Whether navigating job sites or highway hauling, this suspension system is designed to improve chassis control and overall stability.

• Specifically engineered for 2017-2023 Ford F-250 and F-350 Super Duty 4WD platforms
• Balances off-road capability with on-road comfort and predictability
• Designed to retain factory towing and payload integrity
• Manufacturer Part Number: 422308

Fits select 1978-1987 Buick Regal, Chevrolet Malibu, Oldsmobile Cutlass, and Pontiac Grand Prix.

Eliminate wheel hop and improve cornering consistency with the BMR Suspension Rear Suspension Kit (RSK028R). Designed to replace weak factory stamped steel control arms, this kit provides the rigidity needed for high-performance street and track applications. The on-car adjustable upper control arms allow for precise pinion angle tuning, while the reinforcement braces tie the upper and lower mounts together to minimize frame deflection under heavy load.

Constructed from heavy-duty DOM steel tubing, this kit features 95-durometer polyurethane bushings. These bushings are internally fluted to retain grease and provide a more responsive feel than OEM rubber without the harshness of solid mounts. All components are finished in a durable red powder coat for long-lasting corrosion resistance.

• Lower Control Arms: 1.50-inch diameter, 0.120-inch wall DOM steel tubing
• Upper Control Arms: 1.25-inch diameter, 0.120-inch wall DOM steel tubing (on-car adjustable)
• Reinforcement Braces: 1.0-inch diameter, 0.156-inch wall steel tubing
• Hardware: CNC-machined chrome-moly steel adjuster with rolled threads
• Bushings: Internally fluted, greasable 95-durometer polyurethane
• Manufacturer Part Number: RSK028R

Fits 2005-2023 Toyota Tacoma models including Base, Pre Runner, SR, SR5, Limited, TRD Sport, TRD Off-Road, and TRD Pro.

The Bilstein B8 8112 (ZoneControl CR) is a direct-fit, 2.65-inch body position-sensitive coilover shock engineered for the front right corner of your Toyota Tacoma. This module features ZoneControl CR technology, which utilizes a sophisticated triple piston design to provide three stages of compression valving and two stages of rebound valving. This position-sensitive damping delivers compliant ride quality during daily driving while providing maximum control and bottom-out resistance during high-velocity suspension inputs.

• Ride Height Adjustability: Threaded spring seat allows for 0 to 3.8 inches of lift depending on the specific application.
• Triple Piston Design: Features three independent pistons for precise oil flow across multiple compression and rebound zones.
• Enhanced Cooling: 60mm remote reservoir increases oil capacity and improves heat dissipation for consistent damping performance.
• Durable Construction: Includes a bolt-on anodized reservoir chassis mount and heavy-duty hardware.
• Manufacturer Part Number: 41-322697

Fits 2021-2025 Ford F-150 (King Ranch, Lariat, Limited, Platinum, STX, Tremor, XL, XLT).

The Bilstein B8 6112 leveling kit is engineered to enhance the stance and off-road performance of your Ford F-150. This direct-fit kit provides increased ground clearance and allows for the fitment of larger tires by leveling the front of the vehicle. Using multiple snap-ring grooves on the shock body, you can choose between several spring seat positions to achieve anywhere from 0 to 2.75 inches of front lift.

Constructed around a large 60mm (2.65-inch OD) shock body, this kit offers significantly increased oil capacity compared to factory shocks, resulting in superior cooling and consistent damping during aggressive use. The 60mm digressive piston is specifically tuned to improve ride comfort on the street while maintaining precise control over rough terrain.

• Large 60mm shock body for maximum durability and heat dissipation
• Digressive piston design for optimized on-road and off-road handling
• Adjustable front lift height from 0 to 2.75 inches via snap-ring grooves
• Vehicle-specific tuning for the 2021-2025 F-150 platform
• Includes (2) 60mm shock absorbers, (2) custom matched cold wound coil springs, and (2) billet aluminum spring seats
• Manufacturer Part Number: 47-323841

Fits select 1973-1987 Chevrolet and GMC Blazer, Jimmy, K10, K15, K1500, and Suburban 4WD models.

Level up your square-body GM truck or SUV with the Tuff Country 3-inch suspension lift kit components. This essential hardware package (MPN 13710) is engineered to provide a 3-inch lift using rear blocks, allowing for increased ground clearance and a more aggressive stance without compromising factory ride quality. Designed for durability and precise fitment, these components ensure your suspension geometry remains reliable for both daily driving and off-road use.

• Lift Height: 3 Inches
• Inclusion: Rear lift blocks and necessary mounting hardware
• Required Components: This kit excludes front leaf springs and shocks (sold separately)
• Construction: High-strength materials designed for off-road durability
• Warranty: Limited Lifetime Warranty
• Manufacturer Part Number: 13710

Please note: This component set is designed to be used in conjunction with specific front springs and shocks to complete the suspension lift. It replaces or supplements factory components to achieve the desired height while maintaining safe operating tolerances.

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird (Base, RS, SS, Z28, and Trans Am).

Modernize your F-body's handling and stance by replacing restrictive factory leaf springs with the QA1 Triangulated Rear Four Link Suspension System. This kit provides a complete conversion to a modern coilover configuration, offering superior axle control and ride quality without the need for floor pan modifications. The system features tubular links that allow for precise adjustment of pinion angle, wheelbase, and ride height directly on the vehicle.

The included QA1 Proma Star single-adjustable coilovers offer 18 valving options to simultaneously tune compression and rebound. This allows you to dial in the suspension for a comfortable street ride or a firm, performance-oriented setup. For those seeking an aggressive look, the system provides +2 inches to -3 inches of ride height adjustability.

• Ride Height Adjustability: Adjustable from +2" to -3" over stock height.
• Increased Tire Clearance: Supports up to 11" wheels on 1967-1968 models and 12" wheels with 335 tires on 1969 models (requires mini-tubs for maximum width).
• Installation: Minimal welding required to axle housing and chassis; retains factory floor pans.
• Proma Star Shocks: Single-adjustable aluminum bodies with 18 valving positions for simultaneous compression/rebound tuning.
• Included Hardware: Spanner wrench and necessary mounting hardware.
• Manufacturing: Made in the USA and eligible for a lifetime shock warranty with manufacturer registration.
• Manufacturer Part Number: R156-170

Fits select 2005-2010 Ford Mustang models including Base, GT, Bullitt, and Shelby variants (4.6L).

The Roush Stage 2 Suspension Kit is a comprehensive handling upgrade designed as a fully integrated system for the 2005-2010 Mustang chassis. This package replaces factory equipment with performance-valved dampeners and specialized springs to lower the center of gravity and improve lateral stability. Roush engineers spent hundreds of hours tuning this system on the race track, slalom, and skid pad to deliver a configuration that provides aggressive handling without sacrificing ride quality.

• Complete kit includes performance-tuned springs, dampeners, jounce bumpers, and anti-roll bars
• Engineered as a holistic system to provide superior handling and balanced response
• Extensively track-tested on diverse road surfaces to ensure peak performance
• Designed to work together to eliminate body roll and improve cornering grip
• Manufacturer Part Number: 401296

Fits 1964-1970 Ford Mustang models including Base, Boss 302, Boss 429, Mach 1, Grande, and Shelby GT-350/GT-500.

The Ridetech Bolt-On 4-Link Rear Suspension System (MPN 12087197) is engineered to replace the factory leaf springs, providing vastly improved axle control and handling for classic Mustang platforms. This kit utilizes a bolt-on cradle and axle brackets to optimize the rear suspension geometry, reducing wheel hop and enhancing traction under both acceleration and cornering.

The included double adjustable link bars allow for precise fine-tuning of the pinion angle and wheelbase. Each bar is equipped with Ridetech R-Joints, which offer low-friction, multi-axis movement without the noise or harshness associated with traditional spherical bearings. The entire system is finished in a durable black powder coat to ensure long-term protection against the elements.

• Double adjustable bars for custom suspension tuning and alignment
• R-Joint rod ends provide bind-free articulation and quiet operation
• Bolt-on cradle simplifies installation and maintains chassis integrity
• Durable black powder coated finish on all major components
• Includes axle brackets and high-strength mounting hardware
• Note: Required Shockwaves or Coil-Overs are sold separately

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird.

The Ridetech Bolt-On 4-Link system transforms the handling and ride quality of your classic F-Body by replacing restrictive OEM leaf springs with modern rear suspension geometry. This kit attaches directly to factory leaf spring mounts, requiring only four small tabs to be welded to the axle for the upper bars. Designed for versatility, this system is fully compatible with mini-tubs and significantly increases lateral stability while allowing for precise axle positioning to eliminate flexing through corners.

• Optimized Geometry: Double adjustable 4-link bars allow for tuning the anti-squat percentage and roll center height for superior stability.
• Patented R-Joint Technology: Features R-Joint rod ends that provide low-friction movement, full range articulation, and quiet operation for both street and track use.
• Lowered Stance: Provides approximately 1-3 inches of lowering when used with Ridetech Coil-Overs or Shockwave air suspension (sold separately).
• Durable Construction: Heavy-duty bars and high-quality hardware ensure the system handles high-performance driving demands.
• Installation: Bolts to factory mounting points; requires minor welding of tabs to the axle tubes.

Manufacturer Part Number: 11167197

Fits select 1958-1964 Chevrolet Bel Air, Biscayne, Impala, El Camino, and additional full-size models.

The Ridetech Rear CoolRide Kit is engineered to replace your vehicle's factory coil springs with an integrated air spring and shock system, delivering a significant improvement in ride quality and the ability to adjust your stance on demand. This specific kit is designed for use exclusively with Ridetech StrongArm lower control arms to ensure proper geometry and clearance.

Built with durability and performance in mind, the kit features HQ Series monotube shocks which provide superior oil control and rebound adjustment for fine-tuning your suspension feel. The included brackets are vehicle-specific for a precise fit, and all necessary hardware is provided to complete the installation on your B-Body or wagon chassis.

• Replaces factory rear coil springs with adjustable air springs
• Includes HQ Series rebound-adjustable monotube shocks
• Application-specific mounting brackets for correct fitment
• Requires use of Ridetech StrongArm lower control arms
• All necessary mounting hardware included
• Manufacturer Part Number: 11054610

Fits select 1958-1964 Chevrolet full-size models including Bel Air, Biscayne, El Camino, and Impala. This Ridetech Front CoolRide Kit (MPN 11050910) is a high-performance air suspension solution engineered specifically for use with Ridetech lower StrongArms. By replacing the rigid factory coil springs with heavy-duty air springs and HQ Series shocks, this kit provides a significant upgrade in ride quality and adjustable stance.

The included HQ Series shocks feature impact-forged aluminum bodies and 24-position rebound adjustment, allowing you to fine-tune the dampening to your specific driving preferences. The system utilizes heavy-duty bolt-on shock mounts to relocate the dampers, ensuring optimal suspension geometry and clearance during travel. This kit is designed for straightforward installation using standard hand tools.

• Manufacturer Part Number: 11050910
• Series: CoolRide (Front)
• Compatibility: Requires use of Ridetech lower StrongArms
• Shock Type: HQ Series single-adjustable rebound shocks
• Mounting: Includes bolt-on shock mounts and brackets
• Included Hardware: Air springs, brackets, HQ Series shocks, mounts, and all necessary fasteners

Fits 1955-1957 Chevrolet Bel Air, One-Fifty Series, and Two-Ten Series models equipped with a two-piece frame.

The Ridetech Bolt-On 4-Link system is engineered to replace the restrictive factory leaf spring suspension on Tri-Five Chevrolets, providing superior axle control and significantly improved ride quality. This kit utilizes a bolt-on chassis crossmember to simplify installation and maintain structural integrity. The system includes heavy-duty bars featuring single adjustability, allowing for precise fine-tuning of the rear suspension geometry. To ensure smooth, bind-free articulation, the kit is equipped with R-Joint technology, which combines low-friction movement with high-impact durability.

• Specifically designed for 1955-1957 Chevrolet "Two-Piece" frame configurations
• Single adjustable link bars for customizable suspension tuning
• Low-friction R-Joints eliminate bind and noise
• Includes bolt-on chassis crossmember and diagonal link for lateral stability
• Weld-on axle brackets for a secure, high-strength attachment
• Durable black coated finish for corrosion resistance
• Manufacturer Part Number: 11037199

Note: This 4-link system is designed for use with Ridetech Shockwaves or Coil-Overs (sold separately).

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird (Base, RS, SS, Z28, Trans Am, and select engines).

Ditch the factory leaf springs and take control of your F-body with the QA1 MOD Series Rear Triangulated 4-Link Suspension System. This upgrade replaces outdated OE components with tubular 4-link geometry and high-performance coilovers, significantly improving ride quality and handling while providing a custom stance. The triangulated design provides superior lateral stability without requiring a Panhard bar, making it an ideal solution for street and track performance.

• MOD Series Shocks: Equipped with 4-way adjustable valving for independent tuning of high- and low-speed compression and rebound.
• Adjustable Ride Height: Achieve the perfect stance with +2 inches to -3 inches of ride height adjustability.
• Increased Wheel Clearance: Designed to accommodate wider wheels, supporting up to 11-inch widths on 1967-1968 models and 12-inch widths with 335 tires on 1969 models (requires mini-tubs for maximum width).
• Simplified Maintenance: Fine-tune pinion angle, wheelbase, or ride height without removing links.
• Durable Construction: Made in the USA with high-strength tubular links and precise mounting points.

• Manufacturer Part Number: R356-170
• Adjustability: 4-Way Independent Valving
• Ride Height Range: +2" to -3"
• Fitment Requirement: Welding required; no floor pan modifications needed
• Included: MOD Series shocks, tubular 4-link, spanner wrench, and hardware

Fits 1968-1972 Chevrolet Chevy II, Nova, and Pontiac Ventura.

Replace restrictive factory leaf springs with the QA1 triangulated 4-link suspension system to transform the handling and stance of your GM X-Body. This conversion provides precise axle control and enables +2 to -3 inches of ride height adjustability, allowing you to achieve a custom stance without compromising ride quality. The tubular design increases chassis rigidity and creates the necessary clearance for significantly wider wheel and tire combinations.

The system features QA1 double-adjustable shocks, providing independent control over compression and rebound settings for fine-tuned performance on both the street and the track. Installation is engineered for efficiency, requiring minimal welding and zero modifications to the factory floor pan. While designed for generous clearance, achieving maximum tire width will require mini-tubs.

• Manufacturer Part Number: R258-170
• Ride Height Range: +2 in. to -3 in. adjustability
• Wheel/Tire Fitment: Accommodates up to 11-in. wide wheels and 315mm tires (requires mini-tubs for maximum width)
• Shock Type: Double-adjustable coilovers for independent compression and rebound tuning
• Design: Triangulated tubular 4-link; no floor pan modifications required
• Installation: Minimal welding required; includes spanner wrench
• Manufacturing: Made in Lakeville, Minnesota, USA
• Warranty: Lifetime shock coverage available through QA1 registration

Fits 1967-1969 Chevrolet Camaro (Base, RS, SS, Z28) and Pontiac Firebird (326, 350, 400, HO, Sprint, Trans Am).

Ditch the restrictive factory leaf springs and modernize your 1967-1969 GM F-Body rear suspension with the QA1 triangulated 4-link system. This comprehensive upgrade replaces the leaf spring architecture with a tubular 4-link and double adjustable coilovers, significantly improving geometry, ride quality, and traction. The system is designed to work with both standard wheel wells and mini-tubs, providing clearance for up to 11-inch wide wheels on 1967-1968 models and 12-inch wide wheels with 335 tires on 1969 models.

The included double adjustable shocks feature independent knobs for compression and rebound tuning, allowing you to dial in performance for the street or the track without removing the links. This kit offers a ride height adjustment range from +2 inches to -3 inches relative to stock, enabling the perfect stance while maintaining suspension travel.

• Ride Height Adjustability: +2" to -3" adjustment range for precise stance control.
• Double Adjustable Valving: Independent compression and rebound knobs for 18+ positions of tuning.
• Tire Clearance: Optimized for wider wheel packages; fits up to 12" wide wheels (requires mini-tubs).
• Installation: Requires welding to the axle housing; no floor pan modifications necessary.
• Included Hardware: Spanner wrench and all necessary mounting hardware.
• Manufacturer Part Number: R256-170
• Origin: Made in the USA.

Fits select 1968-1970 Dodge Charger, Coronet, and Plymouth B-Body models including GTX, Road Runner, and Satellite.

The QA1 Rear 4-Link Suspension System (MPN: R253-175) converts your 1968-1970 Mopar B-Body from traditional leaf springs to a modern triangulated 4-link coil-over design. This system provides a more planted feel, allows for larger wheel and tire fitment, and corrects the wheelbase for improved geometry. The design specifically accommodates up to 3-inch bumper-exit exhaust systems for a clean finish.

Constructed with powder-coated tubular steel, the kit includes a heavy-duty crossmember along with upper and lower trailing arms. It is compatible with factory-located or inboard-located leaf spring mounts and supports popular rear ends, including the Mopar 8 3/4-inch, Ford 9-inch, and Dana 60. Double-adjustable coil-over shocks offer independent control over compression and rebound, making it an ideal choice for vehicles used for drag racing, autocross, or spirited road course driving.

• Triangulated 4-link design replaces factory leaf spring suspension
• Double-adjustable shocks for precision compression and rebound control
• Adjustable ride height for custom stance and performance tuning
• Powder-coated tubular steel components: crossmember, upper and lower trailing arms
• Compatible with Mopar 8 3/4", Ford 9", and Dana 60 axle housings
• Installation requires minor cutting and welding to the frame and axle housing
• Includes all necessary installation hardware
• Manufacturer Part Number: R253-175
• Made in the USA

Fits select 1973-1986 Chevrolet C10 Pickup and Suburban models equipped with a GM 10-bolt rear axle.

Transform the handling of your Square Body with the QA1 R230-250 Rear Suspension Conversion System. This engineered-from-scratch kit replaces the restrictive factory leaf springs with a modern torque arm design that eliminates the binding issues common in traditional 4-link setups. Designed for a straightforward installation, this system bolts directly to factory mounting points, allowing you to upgrade your rear suspension without removing the truck bed.

The system features double-adjustable coil-over shocks, providing independent control over compression and rebound to fine-tune your ride quality and launch characteristics. With a 250lbs/in spring rate and a firm valving profile, it offers superior stability and body control. The adjustable coil-over mounts allow for a significant drop of 4" to 7" below stock height, helping you achieve the perfect stance while maintaining suspension travel.

• MPN: R230-250
• Axle Compatibility: Fits GM 10-Bolt housings
• Adjustment Range: 4" to 7" drop below factory ride height
• Shock Type: Double adjustable coil-overs, 100% dyno tested and serialized
• Spring Rate: 250lbs/in
• Construction: Bolt-in torque arm design manufactured in Lakeville, Minnesota
• Installation: No bed removal required; includes all necessary mounting hardware

Fits 1963-1972 Chevrolet C10 Panel, Pickup, and Suburban models originally equipped with coil-spring rear suspension.

The QA1 Rear Suspension Conversion System transforms your C10's factory coil-spring rear end into a fully adjustable coilover setup. This bolt-on kit provides up to 6 inches of total drop, allowing you to achieve a custom stance while significantly improving handling. By relocating the coilovers to the outside of the frame rails, the system increases cornering stability and creates additional clearance for popular aftermarket rear-mounted fuel tanks.

This system features tubular steel truck arms with integrated pinion angle adjustment, eliminating the need for angled shims and allowing for precise wheelbase indexing. An adjustable panhard bar keeps the rear axle centered, while multiple mounting locations allow for roll center geometry correction based on your specific ride height. The entire system is designed for a straightforward installation that can be completed without removing the truck bed.

• Valving: Double Adjustable (Firm) for precise compression and rebound tuning
• Spring Rate: 250 lbs/in
• Drop Range: Up to 6 inches of total drop
• Geometry: Integrated pinion angle adjustment and adjustable panhard bar
• Construction: Heavy-duty tubular steel truck arms
• Installation: Bolt-on design; no bed removal required
• Origin: Made in the USA
• Manufacturer Part Number: R210-250

Fits 1963-1972 Chevrolet C10 Pickup, Panel, and Suburban models originally equipped with coil-spring rear suspensions.

The QA1 C10 rear suspension conversion system is engineered to replace factory coil springs with high-performance adjustable coil-overs, providing up to a 6-inch total drop. This system relocates the coil-overs to the outside of the frame rails, closer to the wheels, significantly improving cornering stability while creating additional clearance for popular aftermarket rear-mounted fuel tanks. The included tubular steel truck arms feature integrated pinion angle adjustment, allowing you to set the wheelbase and driveline geometry precisely without the use of angled shims.

Designed for a straightforward bolt-on installation, this kit can be installed without removing the truck bed. The adjustable panhard bar keeps the rear axle centered for predictable handling, and multiple mounting locations allow for roll center geometry correction based on your chosen ride height.

• Manufacturer Part Number: R210-200
• Shock Series: Double Adjustable for independent compression and rebound tuning
• Spring Rate: 200lbs/in (Medium)
• Ride Height: Adjustable up to 6" total drop
• Construction: High-strength tubular steel truck arms
• Installation: Direct bolt-on design; no bed removal required
• Origin: Made in the USA

Fits 1970-1981 Chevrolet Camaro and Pontiac Firebird models. This QA1 rear four-link suspension system replaces restrictive factory leaf springs with a modern triangulated 4-link configuration, providing superior axle control and a fully adjustable ride height for the second-generation GM F-Body.

Constructed with tubular steel links and featuring single-adjustable Proma Star coilover shocks, this kit allows you to fine-tune dampening and dial in the perfect stance. The design provides significantly more clearance than factory setups, accommodating wheels up to 12 inches wide and 335-series tires when used with mini-tubs. By relocating the suspension pick-up points, it optimizes roll center and center of gravity for improved cornering stability and traction without sacrificing street drivability.

• Manufacturer Part Number: R157-170
• Adjustable ride height: Typical range 10.75" to 12" (Camaro) / 13.75" to 15" (Firebird) from axle centerline to fender arch
• Single-adjustable Proma Star shocks for simultaneous compression and rebound tuning
• Includes spanner wrench for easy coilover height adjustment
• Supports both standard and mini-tubbed wheel wells
• Requires welding for installation
• Requires exhaust modification (will not clear over-the-axle exhaust systems)
• QA1 subframe connectors strongly recommended for chassis rigidity
• Made in the USA

Fits 1988-1998 Chevrolet C1500 2WD pickups across all submodels including 454 SS, Base, Cheyenne, Scottsdale, Silverado, and WT.

The QA1 Rear Suspension Conversion System modernizes the handling and stance of your GMT400 C1500 without the need to remove the truck bed. Engineered as a high-performance alternative to traditional 4-link setups, this system provides a 4-inch to 7-inch drop while eliminating the binding issues common in other designs. The torque arm and panhard bar configuration offers superior control over axle movement, allowing you to dial in a precise stance and a smooth, compliant ride.

This "Soft" spring rate configuration features 170lbs/in springs and single-adjustable shocks, allowing you to tune the rebound damping to your specific driving preference. The system is entirely bolt-in, requiring no welding for installation. Every component, from the bracket mounts to the trailing arms, is designed to be adjustable independently so that one change does not negatively impact another setting.

• MPN: R140-170
• Spring Rate: 170 lbs/in (Soft)
• Adjustability: Single-adjustable shock valving (rebound)
• Drop Range: 4" to 7" below factory ride height
• Installation: 100% bolt-on; no welding or bed removal required
• Construction: Proudly manufactured in Lakeville, Minnesota
• Testing: All shocks are 100% dyno tested and serialized
• Hardware: Includes all necessary mounting hardware, panhard bar, torque arm, and trailing arms

Fits select 1973-1986 Chevrolet C10 and C10 Suburban models (including Big Ten, Cheyenne, Custom, Scottsdale, and Silverado). This QA1 rear suspension conversion system transforms your vintage pickup's utility-focused leaf spring setup into a high-performance, modern handling machine without requiring you to remove the truck bed during installation.

Engineered from the ground up, this system features a unique bolt-in torque arm design. Unlike traditional 4-link setups that can suffer from binding, the QA1 torque arm maximizes axle control and eliminates bind, resulting in a significantly smoother ride and more predictable cornering. The included single-adjustable coil-over shocks allow you to fine-tune the damping with 18 simultaneous compression and rebound settings, paired with 170lbs/in soft-rate springs for a street-friendly feel.

Achieve the perfect stance with integrated ride height adjustability, offering a range from 4 inches to 7 inches below the factory stock level. All components are manufactured in QA1's Lakeville, Minnesota facility, featuring 100% dyno-tested and serialized shocks for verified performance.

• Replaces factory leaf springs with a high-performance torque arm system
• Allows for 4-7" drop from stock ride height
• Includes single-adjustable coil-overs for precision valving control
• Soft-rate 170lbs/in springs for optimized ride quality
• Compatible with GM 10-bolt rear axles
• Full bolt-in installation with no bed removal required
• Made in the USA and includes all necessary mounting hardware
• Manufacturer Part Number: R130-170

Fits 1963-1972 Chevrolet C10 Pickup, Panel, and Suburban models originally equipped with coil-spring rear suspension.

The QA1 R110-200 bolt-on rear suspension system is engineered to modernize your 1963-1972 C10 by converting the factory coil-spring setup to high-performance adjustable coilovers. This system provides up to a 6-inch total drop, allowing you to achieve a slammed stance while significantly improving handling and ride quality. The tubular steel truck arms feature integrated pinion angle adjustment, allowing for precise wheelbase centering and drivetrain alignment without the need for angled shims.

To ensure predictable cornering and stability, the kit includes an adjustable panhard bar with multiple mounting locations to correct roll center geometry based on your ride height. The single-adjustable coilovers are relocated to the outside of the frame rails, closer to the wheels, which increases cornering stability and creates additional clearance for popular aftermarket rear-mounted fuel tanks. This entire system is designed for a straightforward bolt-on installation that does not require removing the truck bed.

• Manufacturer Part Number: R110-200
• Adjustability: Single-adjustable shock valving
• Spring Rate: 200 lbs/in (Medium)
• Lowering Range: Up to 6" total drop
• Construction: Heavy-duty tubular steel truck arms
• Installation: Bolt-on design; no bed removal required
• Manufacturing: Made in the USA

Fits 1988-1998 Chevrolet C1500 models including 454 SS, Base, Cheyenne, Scottsdale, Silverado, and WT.

The QA1 Level 3 Handling Kit (MPN: HK03-OBS1) is engineered for OBS Chevrolet owners who demand competition-grade performance without sacrificing the ability to drive to the track in comfort. This comprehensive suspension system replaces factory components with lightweight, high-strength tubular hardware and fully adjustable damping to maximize cornering grip and chassis stability.

This kit features complete front and rear coil-over conversion systems. When used with drop spindles, the front system allows for up to a 6-inch drop, while the rear provides a 4-inch to 7-inch drop range. To further refine body roll and lateral transitions, the kit includes both front and rear tubular sway bars. Every component is designed to work as a cohesive system, offering ultimate ride height and shock tunability for consistent performance on the street or the autocross course.

• Complete front and rear coil-over conversion for precise ride height and damping control
• Up to 6-inch front drop (with drop spindles) and 4-7 inch rear drop
• Heavy-duty tubular front and rear sway bars included
• Strong, lightweight tubular components for reduced unsprung weight
• Manufacturer Part Number: HK03-OBS1
• Made in the USA

Fits 1988-1998 Chevrolet C1500 models, including 454 SS, Base, Cheyenne, Scottsdale, Silverado, and WT.

The QA1 Level 2 Handling Kit is engineered to transform the suspension of your OBS Chevrolet C1500, delivering significantly improved street performance and a modern ride profile. This kit replaces the factory setup with fully adjustable front and rear coil-over conversion systems, allowing you to fine-tune both ride height and shock valving for the perfect balance of comfort and handling.

This Level 2 system provides up to a 4-inch front drop when paired with drop spindles and an adjustable 4-inch to 7-inch rear drop. Built with strong, lightweight tubular components, this kit also includes a front tubular sway bar to reduce body roll and improve cornering stability without sacrificing ride quality.

• Full front and rear coil-over conversion systems for maximum shock and height tunability
• Front drop capability up to 4 inches (requires drop spindles)
• Adjustable rear drop from 4 inches to 7 inches
• Strong, lightweight tubular components for increased stiffness and weight savings
• Includes high-performance front tubular sway bar
• Bolt-on installation for consistent performance and straight-line stability
• Made in the USA
• Manufacturer Part Number: HK02-OBS1

The QA1 52623-S750 Single Adjustable Front Coilover Crossmember System fits 1973-1974 Chevrolet C10 Pickup (Base) models, providing a comprehensive front suspension overhaul. This system replaces the bulky factory crossmember and control arms with modern, performance-oriented components designed to improve handling and allow for a custom ride height stance.

At the core of this system are QA1 single adjustable shocks, which offer simultaneous compression and rebound tuning via a single knob to suit various driving conditions. The tubular upper and lower control arms are engineered with performance-enhancing geometry, offering greater strength and precision than stock stamped-steel units. This kit is designed as a direct bolt-in installation, utilizing factory mounting points to simplify the conversion process.

• Manufacturer Part Number: 52623-S750
• Adjustability: Single adjustable shocks for simultaneous compression and rebound valving
• Height Adjustment: Integrated coilover design allows for precise ride height control
• Springs: Includes high-travel springs for improved suspension articulation
• Included Components: Upper and lower control arms, single adjustable shocks, springs, upper bracket, crossmember, and all necessary mounting hardware
• Manufacturing: Made in the USA

Fits 1973-1974 Chevrolet C10 Pickup Base.

The QA1 52623-D750 Double Adjustable Front Coilover Crossmember System is a comprehensive suspension overhaul designed to replace the heavy factory crossmember and outdated front-end components. This system transforms the handling of 1973-1974 C10 trucks by introducing modern geometry and precision adjustability. The included double-adjustable shocks feature independent dials for compression and rebound, allowing you to fine-tune the damping for street cruising or aggressive track use.

This bolt-in conversion includes high-strength upper and lower control arms engineered to improve suspension travel and alignment stability. The integrated crossmember and upper brackets provide a rigid foundation for the 750lb/in high-travel springs, enabling precise ride height adjustments for the perfect stance. Built for durability and performance, this kit is manufactured in the USA and includes all necessary hardware for a straightforward installation.

• Manufacturer Part Number: 52623-D750
• Independent compression and rebound adjustment for precise shock tuning
• High-travel 750lb/in springs for consistent performance
• Performance-optimized suspension geometry for improved handling
• Heavy-duty upper and lower control arms included
• Includes front crossmember and upper shock brackets
• Adjustable ride height for customized truck stance
• Made in the USA with a bolt-in design

Fits the 1973-1974 Chevrolet C10 Pickup Base.

The QA1 Double Adjustable Front Coilover Crossmember System (MPN: 52623-D650) is a comprehensive suspension overhaul designed to replace factory stamped-steel components with precision-engineered performance parts. This bolt-in kit allows for fully adjustable ride height and significantly improved suspension geometry for better handling and front-end control.

At the heart of the system are QA1 double adjustable shocks, featuring independent dials for compression and rebound tuning. This allows you to dial in the perfect valving for street cruising, track days, or towing. The kit includes 650lb/in high-travel springs, tubular upper and lower control arms, and a replacement crossmember to provide superior strength and clearance compared to stock setups.

• Double adjustable shock valving for independent compression and rebound control
• 650lb/in high-travel springs optimized for heavy-duty front-end performance
• High-strength tubular upper and lower control arms for enhanced geometry
• Includes specialized crossmember, upper brackets, and all necessary mounting hardware
• Direct bolt-in installation to factory mounting points
• Manufacturer Part Number: 52623-D650
• Made in the USA

Fits 1963-1972 Chevrolet C10 Pickup Base.

Modernize your classic truck's handling and stance with the QA1 Front Coilover Crossmember System. This comprehensive kit (MPN 52622-S850) replaces the bulky factory front crossmember and suspension with a performance-engineered setup designed for superior geometry and adjustable ride height. It provides the clearance needed for larger wheels and modern engine swaps while significantly improving front-end rigidity and steering response.

This system features QA1 single adjustable shocks, allowing you to fine-tune the rebound and compression valving simultaneously with one knob to match your driving style. The included high-travel springs and performance-optimized control arms work together to eliminate the geometry compromises of the original OE suspension.

• Complete bolt-in installation with included hardware; no welding required
• Single adjustable shocks provide 18 levels of simultaneous compression and rebound adjustment
• Upper and lower control arms with performance-enhancing geometry
• Integrated crossmember and upper shock brackets for increased strength over stock
• Adjustable ride height to achieve the perfect truck stance
• Proudly made in the USA for lasting durability and fitment
• Manufacturer Part Number: 52622-S850