Fits select 1967-1974 Buick Apollo, Chevrolet Camaro, Chevrolet Chevy II/Nova, Oldsmobile Omega, and Pontiac Firebird/Ventura.

The QA1 GM Pro Coil System offers a direct bolt-in solution for enthusiasts seeking precise ride height control and adjustable damping. This system features single-adjustable billet aluminum shocks, allowing you to tune compression and rebound simultaneously with a single knob. The 10-inch high-travel springs use a 400 lbs/in rate and a pigtail-style seat, designed to fit into factory spring pockets while providing a modern coil-over conversion. The threaded shock bodies enable fine-tuned stance adjustments and corner balancing, significantly improving handling dynamics for street performance, autocross, or drag racing.

• Single Adjustability: Simultaneous compression and rebound valving control for simplified tuning.
• Billet Aluminum Construction: Lightweight, durable, and 100% dyno tested and serialized.
• High Travel Springs: American-made springs with fewer coils and smaller wire diameter for increased travel and reduced unsprung weight.
• Ride Height Adjustable: Fully threaded body allows for the perfect stance and weight distribution.
• Pigtail Design: Specifically engineered to interface with original equipment mounting configurations.
• Serviceable Design: Rebuildable and serviceable by QA1 authorized centers to ensure long-term reliability.
• Made in the USA: Engineered and manufactured for superior quality and fitment.
• MPN: GS401-10400A

Fits 1971-1976 GM B-Body models including Chevrolet Caprice and Impala. This complete bolt-in suspension system is engineered to accommodate wheels up to 28 inches while significantly improving ride quality and handling geometry.

The QA1 Level 2 Big Wheel Kit replaces restrictive factory components with high-strength tubular steel and adjustable damping. The included double-adjustable coilovers provide independent control over compression and rebound valving, allowing you to fine-tune the chassis for cruising or drag racing. Front ride height is adjustable from stock to a 2-inch drop, while the rear can be set anywhere from stock height to a 5-inch drop using the included aluminum spanner wrenches.

To ensure proper wheel fitment, the kit includes adjustable upper and lower trailing arms that center the rear axle within the wheel well, preventing rubbing on large-diameter tire packages. The front tubular control arms are designed with corrected geometry specifically for raised ride heights, while front and rear tubular sway bars reduce body roll and increase stability.

• Fits factory rear housings or Quick Performance 9-inch rear axles
• Double-adjustable coilovers with independent compression and rebound tuning
• Adjustable trailing arms center rear axle for up to 28-inch wheel clearance
• Tubular front control arms with corrected suspension angles
• Front and rear tubular sway bars for reduced body roll
• Complete bolt-on installation with powder-coated finish and hardware included
• Manufacturer Part Number: BW02-GMB4
• Made in the USA

Fits 1991-1996 Buick Roadmaster, Chevrolet Caprice, and Chevrolet Impala SS.

Achieve the perfect stance and geometry for your B-Body with the QA1 Level 1 Big Wheel Kit (BW01-GMB6). Specifically engineered for enthusiasts running larger wheel diameters, this kit solves the common issue of wheel centering while providing modern handling characteristics. The inclusion of adjustable trailing arms allows you to precisely center your wheels in the well, preventing rubbing and improving aesthetics.

• Complete Shock Package: Includes high-performance shocks for all four corners with on-the-car adjustability to fine-tune ride quality.
• Geometry Correction: Features tubular control arms for increased strength and better suspension travel compared to factory stamped steel parts.
• Adjustable Trailing Arms: Essential for centering large wheel and tire combinations within the rear wheel arches.
• Ride Height Control: Designed to help you dial in the exact ride height needed for your specific wheel offset.
• Direct Bolt-In: Engineered to mount to factory locations for a straightforward installation process.
• Quality Construction: Manufactured in the USA for maximum durability and precision.

Fits 1977-1990 Buick LeSabre, Chevrolet Caprice and Impala, Oldsmobile Delta 88, and Pontiac Bonneville, Catalina, and Parisienne.

The QA1 Level 1 Big Wheel Kit is specifically engineered to address the suspension geometry and fitment challenges associated with oversized wheels on GM B-Body platforms. This comprehensive bolt-in system provides the necessary adjustability to maintain proper handling and wheel centering, ensuring your high-riser or big wheel car sits correctly and drives comfortably.

• Wheel Centering: Includes adjustable trailing arms designed to center the wheels within the wheel well for better clearance and aesthetics.
• Adjustable Dampening: Features on-the-car shock adjustments, allowing you to fine-tune your ride quality for specific wheel weights and road conditions.
• Heavy-Duty Construction: Tubular control arms provide superior strength and durability compared to factory stamped-steel arms.
• Adjustable Ride Height: Tailor the stance of your vehicle to accommodate various wheel and tire combinations.
• Direct Installation: Designed as a straightforward, bolt-in upgrade to factory mounting points.
• Manufacturing: Made in the USA.
• Manufacturer Part Number: BW01-GMB5

Enhance your front suspension with the QA1 8MB600 tapered chrome coil spring. Specifically engineered for QA1 Mustang II coil-over conversion systems, this spring features a 3.5-inch upper inside diameter and a 2.5-inch lower inside diameter for precise fitment. The high-luster chrome finish delivers a show-quality appearance for street rods, hot rods, and classic builds where aesthetics are as critical as handling.

QA1 springs are manufactured to be as lightweight as possible while providing maximum travel and consistent performance. Every spring is backed by a manufacturer lifetime guarantee to remain within 2% of its original free height and rate under normal operating conditions, ensuring long-term reliability for your suspension setup.

• Part Number: 8MB600
• Spring Rate: 600 lbs/in
• Length: 8 inches
• Upper ID: 3.5 inches
• Lower ID: 2.5 inches
• Finish: High-luster Chrome Plated
• Compatible with QA1 Mustang II coil-over systems
• Manufacturer lifetime guarantee on spring height and rate

Fits select 1968-1972 Buick Skylark/Special, Chevrolet Chevelle/El Camino, GMC Sprint, Oldsmobile 442/Cutlass, and Pontiac GTO/LeMans/Tempest.

The QA1 GM Pro Coil System offers independent control over compression and rebound valving, allowing you to fine-tune your suspension for specific driving conditions, whether on the street, drag strip, or autocross course. This double-adjustable system features a lightweight billet aluminum shock body with a fully threaded exterior for precise ride height adjustments, allowing for up to a 2-inch drop to achieve the ideal stance and weight balance.

This kit includes QA1 High Travel springs, which are engineered with a smaller wire diameter and fewer coils to reduce unsprung weight and provide increased travel compared to traditional springs. Every shock is 100% dyno-tested and serialized to ensure consistent performance out of the box. Designed for a direct bolt-in installation, these coil-overs work seamlessly with factory or QA1 tubular control arms.

• Manufacturer Part Number: GD401-10450B
• Adjustment Type: Double Adjustable (Independent Compression & Rebound)
• Spring Rate: 450 lbs/in
• Spring Length: 10 inches
• Shock Material: Billet Aluminum
• Installation: Bolt-in; no welding or cutting required
• Serviceability: Fully rebuildable and serviceable by QA1 authorized centers
• Warranty: Limited Lifetime Warranty
• Origin: Made in the USA

Fits 1963-1972 Chevrolet C10 Pickup models.

The QA1 RCK52616 rear coil-over conversion system modernizes your 1963-1972 C10 suspension while retaining the factory truck arms. This bolt-on kit replaces original coil springs with double adjustable coil-overs, providing independent control over compression and rebound valving to dial in precise ride quality and handling performance. By relocating the coil-overs to the outside of the frame rails, closer to the wheels, this system increases cornering stability and provides additional clearance for aftermarket rear-mounted fuel tanks.

Engineered for precision, the included adjustable panhard bar keeps the rear axle centered and allows for roll center geometry correction based on your desired drop. The 200 lbs/in spring rate is optimized for medium-duty applications, offering a balance between street comfort and performance driving. Installation is a direct bolt-on process that can be completed without removing the truck bed.

• Manufacturer Part Number: RCK52616
• Shock Type: Double Adjustable (Independent Compression and Rebound Valving)
• Spring Rate: 200 lbs/in (Medium)
• Mounting: Relocated outside frame rails for improved stability
• Includes adjustable panhard bar for corrected roll center geometry
• Compatible with factory truck arms
• Made in the USA

Fits 1968-1974 Buick Apollo, Chevrolet Nova, Oldsmobile Omega, and Pontiac Ventura (GM X-Body). This Level 3 Handling Kit 2.0 is engineered to provide the highest level of cornering performance for street and track use.

Designed specifically for vehicles with small block or LS engine swaps, this kit features stiffer spring rates and heavy-duty tubular components to significantly reduce body roll and improve steering response. This version is supplied without shocks, allowing you to select the specific shock valving and custom spring rates required for heavily modified or non-standard weight vehicles. All components are designed as a direct bolt-in replacement for original equipment, ensuring compatibility with factory mounting points.

• Replaces heavy factory stamped-steel pieces with strong, lightweight tubular control arms
• Optimized for maximum cornering performance and high-speed stability
• Modular design allows for staged upgrades or complete suspension overhauls
• Specifically geared for small block and LS-powered X-Body platforms
• Includes all necessary hardware for installation
• Manufacturer Part Number: HK33-GMX2
• Made in the USA

Fits select 1958-1996 Chevrolet (Bel Air, Biscayne, Caprice, Impala), Ford (Galaxie), and Mercury (Monterey, Marauder, Meteor) models. This QA1 GM Pro Coil-Over System (MPN: GS507-10450C) provides a direct-fit solution for drivers seeking to modernize their front suspension with adjustable ride height and valving control.

The system features single-adjustable billet aluminum shocks, allowing you to simultaneously tune compression and rebound settings with a single knob. The included 10-inch high-travel springs utilize a 450lb/in rate, designed with fewer coils and a smaller wire diameter to maximize suspension travel while reducing unsprung weight. This combination enables up to 2 inches of ride height adjustment, allowing you to dial in the perfect stance or optimize weight balance for better handling.

• Single Adjustable Valving: Adjust rebound and compression simultaneously for balanced ride quality.
• Billet Aluminum Construction: Lightweight, durable, and 100% dyno tested and serialized.
• High-Travel Springs: American-made springs designed for increased travel and faster reaction times.
• Ride Height Adjustable: Threaded shock bodies allow for up to 2 inches of height adjustment.
• Easy Installation: Bolt-in design compatible with factory or QA1 tubular control arms.
• Serviceable Design: Fully rebuildable by QA1 authorized service centers for long-term reliability.
• Included Hardware: Sold in pairs with a limited lifetime warranty.

Fits select 1978-1988 Buick Regal, Chevrolet El Camino, Malibu, and Monte Carlo, GMC Caballero, and Pontiac Bonneville and Grand Prix.

Engineered for G-Body owners running oversized wheels, the QA1 Big Wheel Front Sway Bar features a high-clearance design that is 4 inches narrower than the factory bar. This unique geometry provides the necessary clearance for a full turning radius even with 24-inch wheels installed. It is compatible with both original equipment (OE) and notched front frame rails, making it a versatile solution for modified pro-touring or street-performance builds.

Constructed from lightweight 1-3/8 inch diameter 4130 chromoly steel, this sway bar significantly reduces body roll and improves chassis response. The bar is precision CNC-formed for a perfect bolt-on fit and includes adjustable end links, allowing you to fine-tune roll stiffness to your driving preferences. Finished in a durable gloss black powder coat, the kit comes complete with greaseable polyurethane bushings and zinc-plated hardware for long-term corrosion resistance.

• Reduced Body Roll: Enhances cornering grip and overall vehicle stability.
• High-Clearance Design: 4" narrower than stock to accommodate 24" wheels.
• Premium Materials: Fabricated from 1-3/8" 4130 chromoly steel for maximum strength-to-weight ratio.
• Adjustable End Links: Customizable stiffness for specific handling needs.
• Complete Kit: Includes greaseable polyurethane bushings and zinc-plated hardware.
• MPN: 52854
• Made in the USA

Fits select 1978-1988 Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, GMC Caballero, and Pontiac Bonneville and Grand Prix models.

Improve your vehicle's handling and drop your 60-foot times by significantly reducing body roll with the QA1 rear anti-roll bar kit. This kit is engineered for drivers who need better grip and stability, whether on the street or the drag strip. Each bar is precision CNC-formed to ensure a direct, bolt-on fit to the factory mounting locations without the need for extensive modification.

Constructed from 1-1/4" diameter 4130 chromoly steel, this anti-roll bar offers superior strength-to-weight performance compared to traditional mild steel bars. The assembly features adjustable end links, allowing you to fine-tune the roll stiffness to match your suspension setup and driving style. The kit is finished in a durable gloss black powder coat for long-term corrosion resistance and includes all necessary zinc-plated hardware.

• Material: 1-1/4" diameter lightweight 4130 chromoly steel
• Finish: Gloss black powder coat
• Bushings: Greaseable polyurethane bushings included
• Hardware: High-quality zinc-plated mounting hardware
• Installation: Precision CNC-formed for a true bolt-on fit
• Adjustability: Includes adjustable end links to customize roll stiffness
• Manufacturer Part Number: 52853

Fits 1996-2004 Ford Mustang Base, GT, Mach 1, and SVT Cobra (4.6L).

This engine mount kit is designed specifically for owners who have already installed a QA1 tubular K-member on their SN95 or New Edge Mustang. This kit provides the necessary hardware and mounting plates to securely seat a 4.6L Modular engine, ensuring proper alignment and clearance within the engine bay. Whether you are performing an engine swap or refreshing your current setup, these mounts offer a direct-fit solution for QA1-equipped chassis.

• Exclusively for use with QA1 Mustang K-members
• Compatible with 4.6L engines across all 1996-2004 trim levels
• Supports multiple engine swap configurations
• High-strength construction for performance applications
• Proudly made in the USA
• Manufacturer Part Number: 52114

Fits select 1978-1996 Buick, Chevrolet, Oldsmobile, and Pontiac B-Body vehicles including the LeSabre, Roadmaster, Caprice, Impala SS, Delta 88, and Parisienne.

The QA1 Pro Rear Coil-Over System is a complete bolt-in conversion kit designed to replace the factory shock and spring setup with a modern, tunable suspension. This system utilizes a single-adjustable aluminum shock, providing 18 positions of simultaneous rebound and compression adjustment to fine-tune ride quality and handling performance with a single knob. The fully threaded shock body allows for precise ride height adjustments, ranging from 0.5 inches higher than stock to 2.25 inches lower than stock.

This kit features American-made, lightweight high-travel springs. These springs are engineered with fewer coils and a smaller wire diameter to increase suspension travel and reduce unsprung weight, allowing the suspension to react faster to road inputs. Every shock is 100% dyno tested and serialized at the QA1 factory in the USA to ensure consistent performance.

• Manufacturer Part Number: RCK52384
• Adjustment Type: Single Adjustable (18 positions)
• Spring Rate: 250 lbs/in
• Spring Length: 12 inches
• Material: Lightweight Aluminum Shock Body
• Installation: Direct Bolt-In; no cutting or welding required
• Maintenance: Fully rebuildable and revalveable
• Warranty: Limited Lifetime Warranty

Included Hardware: Two (2) single adjustable shocks, two (2) high-travel springs, vehicle-specific USA-made mounting brackets, and all necessary installation hardware.

Fits select 1964-1972 Chevrolet Chevelle, Monte Carlo, and Pontiac Grand Prix models. This QA1 Pro Rear Coil-Over System provides a complete suspension transformation, allowing you to dial in the perfect balance of ride quality and track performance with independent control over suspension movement.

Engineered for versatility, these double-adjustable shocks feature 18 positions of compression and 18 positions of rebound adjustment, resulting in 324 possible valving combinations. The fully threaded billet aluminum bodies allow for precise ride height tuning, ranging from a 0.5-inch lift above factory height to a 2.25-inch drop for a lower center of gravity and aggressive stance.

Constructed from lightweight billet aluminum in the USA, each shock is 100% dyno tested and serialized to ensure consistent performance. These units are fully serviceable and rebuildable, making them a long-term solution for street performance, drag racing, or autocross applications. The kit includes 12-inch high-performance springs with a 200 lbs/in rate for optimized rear-end stability.

• Adjustment Range: 18 rebound / 18 compression settings (324 combinations)
• Ride Height: Adjustable from +0.5" to -2.25" relative to stock
• Spring Specifications: 12" length, 200 lbs/in spring rate
• Construction: Lightweight billet aluminum threaded body
• Installation: Direct bolt-in for factory mounting points
• Manufacturing: Made in the USA and 100% dyno tested
• Quantity: Sold as a pair
• MPN: RCK52358

Fits 1968-1974 Buick Apollo, Chevrolet Chevy II/Nova, Oldsmobile Omega, and Pontiac Ventura. This QA1 Level 2 Handling Kit 2.0 is designed to transform the suspension geometry and responsiveness of your GM X-Body platform. Geared toward average-weight small block and LS-powered vehicles, this kit replaces heavy, stamped-steel factory parts with strong, lightweight tubular components to improve cornering performance and straight-line stability.

This specific kit (MPN: HK32-GMX2) is provided without shocks, offering maximum flexibility for builders who need to select specific spring rates or valving for heavily modified vehicles with non-standard weight distributions. Every component is engineered for a direct, bolt-in installation, allowing you to upgrade your chassis in stages without compatibility issues with existing OE mounting points.

• Precision Engineering: Improves launch, stability, and consistent handling.
• Tubular Construction: Stronger and lighter than factory stamped components.
• Compatibility: Designed for small block and LS-powered 1968-1974 GM X-Body vehicles.
• Customization: Sold without shocks to allow for personalized spring and valving selection.
• Manufacturing: Made in the USA for superior quality control.
• Part Number: HK32-GMX2

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird.

The QA1 Level 2 Handling Kit 2.0 (MPN: HK32-GMF1) is engineered to transform the suspension dynamics of first-generation GM F-Body vehicles. Designed specifically for small block and LS-swapped cars with stock trim, this kit replaces heavy, flexible stamped-steel factory parts with strong, lightweight tubular components. This upgrade significantly improves front-end geometry, straight-line stability, and cornering response while maintaining a ride quality suitable for the street.

As a modular suspension solution, this kit is offered without shocks to provide builders with total flexibility. This allows you to select custom spring rates and shock valving tailored to your vehicle's specific weight distribution and performance requirements. Every component is designed for a direct, bolt-in installation to factory mounting points, ensuring a seamless fit and the ability to build your suspension in stages.

• Tubular Construction: High-strength, lightweight components improve suspension rigidity and steering precision.
• Modular Compatibility: Works seamlessly with original equipment mounting points and QA1 components for staged builds.
• Customizable Setup: Shock-free kit allows for personalized selection of spring rates and shock damping.
• Optimized Performance: Specifically geared for small block and LS-powered 1967-1969 F-Body platforms.
• Manufacturer Part Number: HK32-GMF1
• Origin: Proudly made in the USA

Fits select 1968-1972 GM A-Body vehicles, including Chevrolet Chevelle and El Camino, Pontiac GTO and LeMans, Oldsmobile Cutlass and 442, Buick Skylark, and GMC Sprint.

The QA1 HK32-GMA2 Level 2 Handling Kit 2.0 is a performance-oriented suspension solution designed to replace heavy factory stamped-steel components with high-strength tubular construction. Engineered for small block and LS-swapped vehicles, this kit significantly improves cornering geometry and straight-line stability while maintaining a comfortable, street-friendly ride. These components are designed for a direct bolt-in installation, mounting seamlessly to your vehicle's factory locations.

This version of the Level 2 kit is supplied without shocks, providing the flexibility to select the specific shock valving and spring rates required for your vehicle's weight and intended use. This is especially beneficial for heavily modified vehicles that no longer conform to factory weight distributions. All components in this kit are made in the USA and are designed to work together as a cohesive system or as part of a staged suspension build.

• Direct bolt-in installation using factory mounting points
• Strong, lightweight tubular components for improved handling response
• Optimized for average-weight small block and LS-powered vehicles
• Part of a tiered system for compatible staged upgrades
• Manufacturer Part Number: HK32-GMA2
• Made in the USA

Fits 1967-1969 Chevrolet Camaro and Pontiac Firebird models (Small Block / LS).

The QA1 Level 2 Handling Kit 2.0 is engineered to transform the driving dynamics of your first-generation GM F-Body. Designed for enthusiasts seeking a balanced blend of cornering performance and street comfort, this kit provides a significant upgrade over factory stamped-steel components. The Level 2 system features spring rates specifically selected for average-weight small block and LS-powered vehicles, ensuring a composed ride without the harshness of a dedicated track setup.

This comprehensive suspension system utilizes strong, lightweight tubular components that bolt directly to factory mounting points, allowing for a seamless installation with OE-compatible hardware. With included shocks and tunable ride height, you can dial in the perfect stance and damping response for your specific driving style. Whether you are building your car in stages or performing a complete overhaul, this kit provides the compatibility and performance roadmap needed for a modern handling feel.

• Comprehensive handling upgrade for 1967-1969 Camaro and Firebird
• Includes performance-tuned shocks and spring rates optimized for Small Block/LS engines
• Strong, lightweight tubular components improve suspension geometry and stability
• Ultimate ride height and shock tunability for personalized performance
• Direct bolt-in installation works with factory mounting points
• Built to allow for stage-by-stage suspension upgrades
• Made in the USA
• Manufacturer Part Number: HK22-GMF1

Fits select 1968-1972 GM A-Body vehicles including Chevrolet Chevelle and El Camino, Pontiac GTO and LeMans, Oldsmobile Cutlass and 442, and Buick Skylark.

The QA1 Level 1 Handling Kit 2.0 is engineered for drivers who want to improve the cornering and stability of their classic GM A-Body while maintaining a smooth, comfortable street ride. This entry-level kit features tubular suspension components and specifically valved shocks that replace worn factory hardware with modern geometry and dampening. The spring rates are carefully selected for average-weight small block or LS-swapped vehicles in stock trim.

Designed for a straightforward, bolt-in installation, this kit works seamlessly with original equipment mounting points. As part of QA1's modular suspension system, this Level 1 kit (HK21-GMA2) allows you to upgrade your vehicle in stages, providing a reliable foundation that is fully compatible with future performance enhancements.

• Specifically valved shocks for improved dampening and ride control
• Optimized spring rates for small block and LS engine configurations
• Strong, lightweight tubular components to improve suspension geometry
• Direct bolt-in installation requires no fabrication or welding
• Designed to work with factory mounting points and OE components
• Build in stages with the modular 3-level handling system
• Made in the USA
• Manufacturer Part Number: HK21-GMA2

Fits 1969-1972 Chevrolet Monte Carlo and Pontiac Grand Prix.

The QA1 Level 1 Drag Kit 2.0 (MPN: DK31-GMG2) is engineered to improve launch characteristics, straight-line stability, and consistency for classic GM G-body platforms. This kit features strong, lightweight tubular components designed to replace heavy factory suspension parts, providing a solid foundation for drag racing performance. These components are designed for easy, bolt-in installation and work seamlessly with factory mounting points.

This specific version of the Level 1 kit is supplied without shocks, springs, or thrust bearing kits, providing the flexibility to select your own shock series and spring rates based on specific vehicle weight and power levels. It is ideally suited for average-weight small block or LS-swapped vehicles in stock trim.

• Optimized for drag racing launch and straight-line stability
• Strong, lightweight tubular suspension components
• Direct bolt-in installation with OE-compatible mounting
• Modular design allows for future suspension upgrades in stages
• Geared toward average weight small block and LS-powered vehicles
• Made in the USA
• Manufacturer Part Number: DK31-GMG2

Fits select 1968-1972 GM A-Body vehicles, including Buick Skylark, Chevrolet Chevelle and El Camino, GMC Sprint, Oldsmobile Cutlass and 442, and Pontiac GTO, LeMans, and Tempest.

Improve your vehicle's launch and straight-line stability with the QA1 Level 1 Drag Kit 2.0. This suspension system is engineered for drag racing performance, replacing heavy, stamped factory components with high-strength, lightweight tubular parts. Designed as a bolt-in upgrade, this kit integrates seamlessly with OE mounting points and components, making it an ideal choice for enthusiasts building their suspension in stages or upgrading a stock-trim vehicle.

This "without shocks" configuration (DK31-GMA2) offers maximum flexibility for vehicles with significant weight modifications or those requiring specific spring rates and valving. Please note: when selecting this kit without shocks, it does not include coil springs or thrust bearing kits.

• Improved Geometry: Specifically tuned for drag racing to provide consistent performance and weight transfer.
• Tubular Construction: Stronger and lighter than original equipment to reduce unsprung weight.
• Modular Design: Compatible with factory components and easy to upgrade to Level 2 or 3 systems as your build progresses.
• American Made: Engineered and manufactured in QA1's Lakeville, Minnesota facility.
• Manufacturer Part Number: DK31-GMA2

Fits select 1968-1977 GM A-Body vehicles including Buick Regal and Skylark, Chevrolet Chevelle, El Camino and Monte Carlo, Oldsmobile Cutlass and 442, and Pontiac Grand Prix, GTO, and LeMans.

Improve the cornering stability and handling of your GM A-Body with the QA1 1-1/4 inch hollow rear sway bar. Designed to reduce body roll by more effectively distributing weight across all four tire contact patches, this tubular sway bar provides the torsional stiffness required for a more predictable and controlled driving experience. Unlike solid bars that add significant unsprung weight, this hollow bar utilizes 4130 chromoly steel to deliver superior strength and rigidity while remaining lightweight.

Each QA1 sway bar is engineered with CNC-bent tubing and machined bar ends for precise fitment and maximum ground clearance. The assembly is finished with a durable powder coating for long-term corrosion resistance and a clean look. This kit includes high-quality plated mounting hardware to replace worn-out factory bushings and end links, streamlining the installation process.

• Manufacturer Part Number: 52857
• Bar Diameter: 1-1/4 inch
• Material: 4130 Chromoly Steel
• Construction: Hollow tubular design with CNC-bent precision
• Finish: Durable black powder-coat
• Installation: Direct bolt-in for most applications; some specific trims may require minor welding
• Included: All necessary plated mounting hardware, bushings, and end links

Fits all 1994-2004 Ford Mustang models, including Base, GT, Mach 1, and SVT Cobra. Engineered to correct front-end geometry and reduce unsprung weight, the QA1 Street Performance lower control arm kit (52741) replaces heavy factory units with a lightweight, high-strength alternative.

Constructed with forged ball joint housings for maximum reliability and durability, these arms weigh less than 9 lbs each. The low-friction, rebuildable, and greaseable ball joints ensure smooth suspension articulation, while the greaseable polyurethane bushings provide a significant upgrade over factory rubber by resisting deflection and maintaining precise alignment under load. These arms are a direct bolt-in for both factory and QA1 K-members.

• Manufacturer Part Number: 52741
• Fits 1994-2004 Ford Mustang (SN95 and New Edge)
• Weight: Less than 9 lbs per arm
• Includes low-friction, greaseable polyurethane bushings
• Features forged ball joint housings for superior strength
• Compatible with factory and QA1 K-members
• Note: Requires coilover struts; not compatible with factory-style coil springs
• Proudly made in Lakeville, Minnesota, USA

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 1999-2006 Chevrolet Silverado and GMC Sierra 1500 trucks.

Changing suspension components or installing drop spindles on your 1999-2006 GM 1500 can introduce bump steer—a condition where suspension travel causes the wheels to turn slightly in or out without driver input. The QA1 BAX120 Bump Steer Kit is engineered to correct these steering linkage angles by relocating the outer tie rod end higher, restoring proper geometry for more predictable handling during suspension articulation.

This direct-fit kit is designed for straightforward installation. It features a specific stud taper that matches the factory mounting points, eliminating the need for drilling or permanent modifications to your steering knuckles. Manufactured in Lakeville, Minnesota, this kit is an essential upgrade for any lowered Silverado or Sierra 1500.

• Corrects steering linkage angles on lowered trucks or those with drop spindles
• Eliminates unwanted toe changes during suspension travel
• Direct bolt-in design requires no drilling or modifications
• Includes all necessary hardware and tapered studs for installation
• Proudly made in the USA
• Manufacturer Part Number: BAX120

The QA1 XM Series (XMR8) is a heavy-duty, male rod end engineered for high-stress applications such as 4-link systems and ladder bars. Constructed from heat-treated chromoly steel, this rod end provides superior tensile strength and the durability required for demanding motorsport environments.

The assembly features a precision-ground 52100 bearing steel ball that is heat-treated and hard chrome-plated for smooth articulation and extended wear resistance. Its injection-molded Nylon/PTFE race provides a self-sealing and self-lubricating interface that blocks dirt and debris while maintaining low friction under load.

• Manufacturer Part Number: XMR8
• Series: XM (Endura) Series
• Configuration: Male, Right Hand Thread
• Bore Diameter: 0.5 in
• Thread Size: 1/2-20
• Body Material: Heat-treated chromoly steel with a protective corrosion-resistant coating
• Ball Material: 52100 bearing steel, heat-treated and hard chrome plated
• Race Material: Injection-molded Nylon/PTFE
• Performance Features: Increased cross-sectional thickness for tensile strength and metal-to-metal support for heavy shock loads

The QA1 X Series Endura XM Chromoly Steel Series male rod end is engineered for high-strength applications where durability is paramount. These heavy-duty rod ends are common components in 4-link and ladder bar setups, designed to withstand heavy shock loads through increased cross-sectional thickness and superior tensile strength.

Each XMR6 rod end features a self-sealing and self-lubricating Nylon/PTFE injection-molded race. This design effectively keeps dirt and debris out of the bearing surface, ensuring smooth operation without the need for external grease. The body is constructed from heat-treated chromoly steel with a protective coating for long-lasting corrosion resistance.

• MPN: XMR6
• Type: Male Right Hand
• Bore Diameter: .375 inch
• Thread Size: 3/8-24
• Body Material: Heat-treated chromoly steel
• Ball Material: 52100 bearing steel, heat-treated, hard chrome plated, and precision ground
• Race Material: Injection-molded Nylon/PTFE (self-lubricating)
• Design: Metal-to-metal support for maximum shock load capacity

The QA1 XM Series (Endura) rod end is engineered for heavy-duty applications like 4-link systems and ladder bars where tensile strength and durability are critical. These male rod ends feature a body manufactured from heat-treated chromoly steel with a protective coating for superior corrosion resistance and increased cross-sectional thickness to handle heavy shock loads.

Equipped with a self-sealing and self-lubricating Nylon/PTFE injection-molded race, the XMR12 is designed to keep dirt and debris out of the bearing assembly. The ball is constructed from heat-treated, precision-ground 52100 bearing steel and finished with a hard chrome plating for smooth operation and a long service life.

• Part Number: XMR12
• Series: XM Series (Endura)
• Type: Male Right Hand
• Bore Size: 0.75 inch
• Thread Pitch: 3/4-16
• Body Material: Heat-treated Chromoly Steel
• Ball Material: 52100 Bearing Steel, Hard Chrome Plated
• Race Material: Nylon/PTFE (Self-Lubricating)

The QA1 XM Series (Endura) male rod end is engineered for high-strength motorsports applications, including 4-link systems and ladder bars. Constructed from heat-treated chromoly steel, the XMR10 provides exceptional tensile strength and metal-to-metal support designed to withstand heavy shock loads. The body is finished with a protective coating for superior corrosion resistance.

This heavy-duty rod end features a precision-ground 52100 bearing steel ball that has been heat-treated and hard chrome plated for durability. The injection-molded Nylon/PTFE race is both self-sealing and self-lubricating, which effectively blocks dirt and debris while ensuring smooth operation without the need for manual greasing.

• Manufacturer Part Number: XMR10
• Thread Size: 5/8-18
• Thread Direction: Right Hand (Male)
• Bore Diameter: .625 in (5/8 in)
• Body Material: Heat-treated chromoly steel
• Ball Material: 52100 bearing steel, hard chrome plated
• Race Material: Injection-molded Nylon/PTFE
• Design: Metal-to-metal support for shock load resistance

The QA1 XML8 XM Series male rod end is engineered for high-performance applications requiring exceptional tensile strength and durability. Constructed from heat-treated chromoly steel with a protective corrosion-resistant coating, these heavy-duty rod ends are specifically designed to handle heavy shock loads, making them a standard choice for 4-link and ladder bar setups.

• Self-Lubricating Design: Features a Nylon/PTFE injection-molded race that is self-sealing and self-lubricating to keep dirt and debris out of the bearing.
• High-Strength Construction: The body is built with increased cross-sectional thickness for greater tensile strength compared to standard rod ends.
• Precision Bearing: The ball is manufactured from 52100 bearing steel, heat-treated, hard chrome plated, and precision ground for smooth operation and tight tolerances.

Technical Specifications:
• Manufacturer Part Number: XML8
• Series: XM Series (Endura)
• Orientation: Left Hand (LH) Thread
• Bore Size: .500 in
• Thread Size: 1/2-20
• Material: Heat-Treated Chromoly Steel Body
• Race Material: Nylon/PTFE
• Ball Material: 52100 Bearing Steel