Designed, engineered, tested, and assembled in Colorado, SPC Performance adjustable upper control arms are loaded with impressive features. Improve suspension travel, handling, and tire wear while centering the tire in the wheel well for maximum clearance needed for oversized tires. Now equipped with maintenance-free ball joints and free-pivoting xAxis™ sealed flex joints in bonded rubber sleeves, for correction of alignment angles and restoration of factory ride quality. A Forged steel design provides the strength and durability needed for the most demanding environments. SPC adjustable control arms have improved clearance to get around the sp ring bucket and a full 80° of articulation in the ball joint. When trucks are lifted, caster and camber angles are affected that can lead to poor handling characteristics such as ‘wandering’. SPC control arms have positive caster built-in for lifted vehicles to restore alignment angles and driv ability. The patented ball joint design gives more adjustability than any other arm on the market, use it in combination with cam adjusters on the lower arm to maximize tire clearance and minimize the need for frame mods. Replace OE lower cams with #86220. Sold as pairs. US Patent No. 7,513,514.

• New ball joint has 25% larger stud cross section than OE for superior strength & E-Nickel coating for superior corrosion protection while providing 80° of articulation & extended threads make these arms compatible with knuckle gusset kits
• Arm's adjustment range combine with OE adjusters corrects alignment angles for improved driveability and reduced tire wear & possible to move the tire forward to maximize clearance for larger tires without frame or fender modifications
• One piece polymer race Ball Joint with modern grease formula ensures quiet smooth operation & low turning torque for reduced wear and extended life that tests like OE
• Chromoly tube and billet machined steel nose construction provides maximum strength & clearance with additional caster provision for lifted vehicles built-in
• New xAxis™ sealed flex joints in bonded rubber bushings allow for extended suspension travel & superior noise vibration and harshness (NVH) characteristics
• New fully sealed ball joint architecture keeps grease in and contaminants out for a maintenance-free joint
• Front Adjustment Range: Camber ±2.00˚ / Caster -1.00˚ to +3.00˚
• Front Adjustment Range: Camber ±2.00° / Caster -1.00° to +3.00°
• Required: 1 per axle
• Sold as a pair

This Part Fits:

Fits all 1984-1996 Chevrolet Corvette (C4) models, including Base, ZR-1, Grand Sport, Collector’s Edition, and Anniversary editions.

Update your C4 Corvette's front suspension with SPC Performance adjustable upper control arms. This patented design (US Patent No. 9,751,370) offers the highest clearance and widest adjustment range available on the market, allowing for precise tuning of both camber and caster. These arms feature an on-car adjustment mechanism, enabling you to dial in handling for the street or track without removing the arms from the vehicle. The included ball joints are fully rebuildable and greaseable for long-term serviceability, using a stock ball stud to maintain optimal performance.

• Part Number: 97190
• Adjustment Range: Camber/Caster ±3.00°
• Quantity: Sold as a pair (1 per axle required)
• Construction: High-clearance design with rebuildable and greaseable ball joints
• Compatibility: Replaces factory upper control arms; compatible with available 1/4 inch extended studs for customized camber curves

Fits 2007-2017 Jeep Wrangler and Wrangler Unlimited JK (Rubicon, Sahara, Sport, X).

When lifting a Jeep Wrangler JK between 3 and 4 inches, the front caster angle changes, often resulting in vague steering and a tendency for the vehicle to wander at highway speeds. Zone Offroad front alignment cam locks provide a precise, cost-effective solution to restore factory-spec caster and improve overall driveability without the need for expensive aftermarket adjustable lower control arms.

• Corrects front caster to reduce wandering on vehicles with 3-4 inch lifts
• Replaces the need for aftermarket lower control arms for alignment correction
• Complete kit includes inner and outer cam locks for the front axle
• Simple bolt-on installation can be completed in approximately one hour
• Once properly installed, no further adjustments are required
• Manufacturer Part Number: ZONJ5312

Fits 2021-2025 Ford Bronco.

Maintain your alignment settings even under the most demanding off-road conditions with Zone Offroad Cam Lockout Plates. These plates are engineered to replace the factory eccentric cams, which are prone to rotating or slipping during hard impacts and extreme articulation. By locking the lower control arm mounting points in place, you ensure your Bronco stays within spec during trail rides and high-speed maneuvers.

Constructed from heavy-duty laser-cut steel, these lockout plates feature 15 distinct positions to provide a wide range of adjustment for both stock and lifted vehicles. Whether you are running factory or aftermarket control arms, these plates provide the stability needed to prevent your alignment from being "knocked out." Each piece is finished in a durable black e-coating for maximum corrosion resistance and long-term durability.

• 15 lockout positions to correct alignment settings at various ride heights
• Prevents cam rotation and slipping during hard off-road impacts
• Heavy-duty laser-cut steel construction with durable black e-coating
• Compatible with both stock and aftermarket control arms
• Easy bolt-on installation using factory mounting locations
• Designed and manufactured in the USA
• Manufacturer Part Number: ZONF5301

Maintain precise sway bar alignment with the Whiteline KLL135 Universal 35mm (1-3/8in) Alloy Lateral Lock Kit. These locks are designed to prevent the sway bar from shifting or "walking" sideways within its bushings during heavy lateral loads. By securing the bar's position, you ensure consistent stabilizer bar effectiveness and prevent the bar from fouling against the chassis, steering components, or suspension arms.

The DIY-friendly design allows for installation directly onto the vehicle without the need to remove the sway bar. The alloy locks mount flush against the sway bar mounting points for a secure fit on both factory and aftermarket bars.

• Fits 35mm (1-3/8in) diameter sway bars
• Prevents lateral movement under cornering loads
• Constructed from durable alloy for long-term reliability
• No-removal installation; bolts directly to the bar
• Kit includes two (2) lateral locks
• Manufacturer Part Number: KLL135

Designed for 33mm diameter sway bars, the Whiteline KLL133 alloy lateral locking system prevents the sway bar from shifting or "walking" sideways under heavy cornering loads. By securing the bar directly adjacent to the mounting points, these locks maintain proper alignment and ensure maximum stabilizer bar effectiveness while preventing the bar from fouling on the chassis or steering components.

The two-piece alloy design allows for a straightforward DIY installation without requiring the removal of the sway bar from the vehicle. This kit is an essential upgrade for both factory and aftermarket sway bars that lack integrated centering stops.

• Fits 33mm diameter sway bars
• Prevents lateral movement and shifting during cornering
• Two-piece aluminum construction for easy bolt-on installation
• Includes two (2) lateral locks and required hardware
• Manufacturer Part Number: KLL133

Ensure your sway bar stays centered under heavy cornering loads with the Whiteline KLL130 Lateral Lock Kit. Designed to suit 30mm diameter sway bars, these aluminum locks prevent the bar from shifting or walking sideways through the bushings during high-G maneuvers. Maintaining proper centering prevents the sway bar from fouling against the chassis or steering components, ensuring consistent roll control and predictable handling.

The DIY-friendly design allows for quick installation directly onto the sway bar without requiring the removal of the bar or end links. Simply bolt them into place adjacent to the sway bar mounting points for immediate stabilization of both factory and aftermarket sway bar setups.

• Fits 30mm diameter sway bars
• Machined from high-grade aluminum alloy for durability
• Prevents lateral movement and shifting under cornering loads
• Split-design for easy installation without removing the sway bar
• Compatible with OE and aftermarket sway bars
• Manufacturer Part Number: KLL130
• Includes one pair (2) of lateral locks with hardware

Maintain precise suspension geometry on your 2005-2014 Ford Mustang with the Whiteline KLL127 Aluminum Lateral Lock Kit. Designed specifically for 27mm diameter sway bars, these locks prevent the bar from shifting sideways under heavy lateral loads, ensuring consistent handling during hard cornering and sudden lane changes.

Constructed from high-grade anodized aluminum alloy, this kit is engineered to eliminate the flex and movement associated with OE setups. By keeping the sway bar centered, it prevents the bar from fouling against the chassis or steering components, maximizing the effectiveness of your sway bar's rate. The split-design allows for a simple bolt-on installation directly next to the mounting points without needing to remove the sway bar from the vehicle.

• Precision Control: Eliminates lateral sway bar movement to improve steering response and cornering stability.
• Premium Construction: CNC-machined aluminum with a corrosion-resistant anodized finish for long-lasting durability.
• Universal Application: Compatible with both factory and aftermarket 27mm sway bars.
• Easy Installation: DIY-friendly design installs in minutes with no bar removal required; installation guide included.
• MPN: KLL127

Fits all 2005-2014 Ford Mustang models, including Base, GT, Boss 302, and Shelby GT500 variants.

Maintain precise sway bar alignment and prevent lateral movement during aggressive cornering with the Whiteline 23mm-24mm Aluminum Lateral Lock Kit (KLL124). These alloy locks are designed to mount directly to the sway bar, positioned adjacent to the mounting bushings, to eliminate the sideways shifting that can occur under heavy lateral loads.

By keeping the sway bar centered, this kit ensures the bar performs at its intended rate while preventing the arms from fouling against nearby chassis or steering components. The split-design alloy construction allows for a straightforward DIY installation without requiring the removal of the sway bar from the vehicle.

• Fits sway bars with a diameter of 23mm to 24mm
• CNC-machined aluminum construction for long-term durability
• Prevents lateral "walking" of the bar under cornering loads
• Easy bolt-on installation with no bar removal required
• Kit includes two (2) lateral locks and necessary hardware
• Manufacturer Part Number: KLL124

The Whiteline Sway Bar Aluminum 21-22mm Lateral Lock Kit (KLL122) is a precision-engineered solution for maintaining suspension alignment and component clearance. These alloy locks prevent the sway bar from shifting or sliding sideways under high lateral loads during cornering, ensuring the bar remains centered and fully effective.

By securing the sway bar directly next to its mounting points, this kit eliminates the risk of the bar fouling against the chassis or steering components—a common issue when using aftermarket bars or during aggressive driving. The DIY-friendly design allows for a straightforward installation without the need to remove the sway bar from the vehicle.

• Manufacturer Part Number: KLL122
• Compatibility: Fits both factory and aftermarket 21mm to 22mm diameter sway bars
• Material: Lightweight, high-strength aluminum alloy
• Installation: Direct bolt-on design; no bar removal required
• Kit Includes: Two (2) lateral locks and installation hardware

The Whiteline KLL120 lateral locking system is designed to prevent sideways movement or "walking" of the sway bar during heavy cornering. By mounting these alloy locks directly adjacent to the sway bar mounting points, you ensure the bar remains centered, maintaining its effectiveness and preventing the arms from fouling against chassis or steering components.

Constructed from high-grade aluminum for long-term durability, this kit features a user-friendly two-piece design. Installation is a straightforward DIY process that can be completed on the vehicle without removing the sway bar, making it an essential upgrade for both factory and aftermarket sway bar setups.

• Part Number: KLL120
• Compatibility: Designed for 19mm to 20mm diameter sway bars
• Material: CNC-machined aluminum alloy
• Installation: On-car DIY fitment; no sway bar removal required
• Kit Contents: Two (2) lateral locks and required hardware

Maintain precise sway bar alignment and prevent lateral movement with the Whiteline KLL116 Aluminum Lateral Lock Kit. Designed for 15mm to 16mm diameter sway bars, these locks solve the common issue of stabilizer bars "walking" or shifting sideways under heavy cornering loads. By keeping the bar centered, this kit ensures consistent performance and prevents the sway bar from fouling against the chassis or steering components.

The DIY-friendly split-design allows for a straightforward installation without needing to remove the sway bar from the vehicle. These alloy locks mount directly adjacent to the sway bar mounting points (bushings), providing a secure mechanical stop that improves overall suspension predictability.

• Fits 15mm to 16mm diameter sway bars
• Prevents lateral shifting and chassis fouling during cornering
• Precision-machined aluminum alloy construction for long-term reliability
• Split-collar design for easy on-car installation without bar removal
• Includes two (2) lateral locks and required hardware
• Manufacturer Part Number: KLL116

Fits select 1990-2008 Subaru Forester, Impreza, WRX, STI, Legacy, and 2005-2006 Saab 9-2X.

The Whiteline KCA377 is engineered to optimize your vehicle's suspension geometry. By modifying the front control arm mounting points, this kit introduces "anti" geometry that allows the wheels to track the ground with higher precision. This results in significantly improved traction under power, sharper cornering, and a dramatic reduction in both understeer and front-wheel spin.

Built for long-term durability, all metal components feature a specialized protective plating. This hard-skin finish is significantly tougher than standard paint, ensuring the kit can withstand harsh road conditions and resist corrosion over years of service. Each kit includes a detailed installation guide to ensure a straightforward bolt-on process.

• Manufacturer Part Number: KCA377
• Improves front-end grip and traction during acceleration and cornering
• Reduces understeer and front-wheel spin
• Protective plating for superior corrosion resistance and durability
• Direct replacement for worn OE bushings or performance upgrade
• Includes detailed installation instructions

Fits 1998-2009 Subaru Legacy and Outback (including Liberty) models.

The Whiteline KCA307 Rear Toe Lock Bolt Kit is engineered to eliminate unwanted rear toe changes that occur during high-load driving. By replacing factory eccentric adjustment bolts, this kit provides a positive lock for your alignment settings. This ensures the rear wheels track the ground more precisely, leading to superior traction under power, more consistent cornering, and a reduction in understeer and wheel spin.

• Precision Alignment: Locks the rear toe setting to prevent geometry shifts during aggressive maneuvers.
• Durable Construction: Features high-quality protective plating on all metal components to resist corrosion and withstand harsh road conditions.
• Complete Kit: Includes all necessary hardware and a detailed installation guide for a straightforward setup.
• Manufacturer Part Number: KCA307

Whether you are setting up a track car or maintaining a performance street build, these bolts provide the stability needed to keep your Subaru's suspension geometry in check.

Fits 1974-1978 Ford Mustang II (Base, Ghia, Mach 1, and 2+2).

Upgrade your front suspension with the SPC Performance 97260 adjustable upper control arms, engineered specifically for Ford Mustang II coilover conversions and high-performance custom applications. These forged steel arms utilize a patented design (US Patent No. 9,751,370) to provide the highest range of adjustment and clearance available. By incorporating ball studs that are 1/2-inch taller than stock, these arms optimize the camber curve for modern handling characteristics, whether on a daily driver or a track-ready Pro Touring build.

• Front Adjustment Range: Camber/Caster ±3.00°
• Material: High-strength forged steel construction
• Ball Joints: Greaseable and fully rebuildable design
• Hardware: Includes ball studs 1/2-inch taller than OE to improve suspension geometry
• Configuration: Sold as a pair (1 kit required per axle)
• Manufacturer Part Number: 97260

Fits select 1960-2009 Chevrolet, GMC, Ford, Dodge, Jeep, and International solid axle vehicles. These SPC Performance 2-degree axle shims are engineered to correct caster alignment on RWD and 4WD vehicles, helping to restore factory-spec handling and prevent uneven tire wear.

Constructed from heavy-duty zinc alloy for durability, these shims feature a specialized double-breakaway design. This allows a single shim to be modified for a precise fit on 3-inch, 3.5-inch, or 4-inch wide leaf spring pads, reducing the need for multiple part numbers. Use these to adjust caster positive or negative by 2 degrees to accommodate suspension lifts or geometry changes.

• Angle: 2.0 degrees (positive or negative)
• Material: Heavy-duty zinc alloy
• Compatibility: Double breakaway design fits 3", 3.5", and 4" widths
• Quantity: Set of 6 shims
• Application: Solid axle RWD or 4WD vehicles
• Manufacturer Part Number: 89499

Fits select 1998-2010 Audi TT and Volkswagen Beetle, Golf, GTI, and Jetta models (1.8T).

The SPC Performance Rear Shim Wrench (MPN 87530) is a purpose-built specialty tool designed to streamline the installation of rear camber and toe shims. This wrench is specifically engineered to assist technicians in removing the rear hub assembly on Volkswagen and Audi MK4-chassis vehicles without damaging sensitive components.

• Designed specifically for use with SPC 71520 and 71530 series camber and toe shims
• Facilitates efficient rear hub removal for alignment adjustments
• Durable construction built to withstand professional shop use
• Essential tool for maintaining proper suspension geometry during shim installation
• Manufacturer Part Number: 87530

Fits select 2004-2025 Ford F-150 and 2007-2015 Lincoln Navigator models.

Correct driveline alignment and eliminate drivetrain vibrations with SPC Performance pinion angle shims. These wedge-type shims are engineered specifically for the 2-hole mounting design found on the rear axle platforms of Ford and Lincoln trucks. Installed between the rear leaf spring and the axle, these shims allow you to adjust the pinion angle by ±2.50°, which is a critical step for maintaining U-joint health and driveline longevity on vehicles that have been lifted or lowered.

• Adjustment Range: Pinion ±2.50°
• Design: 2-hole wedge-type shim
• Application: Fits between the rear spring and axle
• Requirements: 1 per axle
• Manufacturer Part Number: 86255

Fits select 2009-2018 Audi A4, S4, A5, S5, A6, S6, A7, S7, RS5, RS7, Q5, SQ5, and allroad, plus 2015-2025 Porsche Macan.

Restore proper alignment geometry or fine-tune your handling with the SPC Performance adjustable upper control arm kit. Designed specifically for the Audi B8 and C7 platforms as well as the Porsche Macan, these arms provide +/- 1.5 degrees of camber and caster adjustment. This is essential for correcting tire wear on lowered vehicles or for optimizing the "Virtual SAI" unique to Audi's multi-link front suspension. SPC recommends 5 to 6 degrees of caster for improved tracking and steering return-to-center.

Constructed from forged 6061-T6 aluminum, these arms offer maximum structural integrity with reduced unsprung weight. They feature maintenance-free, OE-style booted ball joints and bonded rubber bushings to preserve factory noise, vibration, and harshness (NVH) levels. This comprehensive kit includes all four upper links required to service both the left and right sides of the vehicle.

• Adjustment Range: Camber/Caster +/- 1.50 degrees
• Material: Forged 6061-T6 Aluminum
• Hardware: Includes replacement pinch bolts and 18mm threaded adjuster links
• Installation: Replaces OE upper links; includes both front and rear upper arms for both sides
• Serviceable: Replacement ball joint boot kits available (Part No. 81354)
• Manufacturer Part Number: 81363

Fits select 2020-2025 Ford Bronco Sport, Escape, Maverick, and Lincoln Corsair models. These SPC Performance EZ Cam bolts allow you to dial in front camber by ±1.75° to correct alignment issues after installing a lift kit or lowering springs, or to compensate for tire wear and chassis settling.

Designed to replace the factory upper strut bolt, these cams feature clear head markings that indicate the position of the cam for maximum change. An easy-to-manipulate toothed washer ensures the setting remains secure after installation. For long-term durability in harsh environments, SPC utilizes a hex-chromate-free finish that has survived a 700-hour salt spray test, providing superior corrosion protection compared to standard hardware.

• Part Number: 81315
• Adjustment Range: ±1.75° Camber
• Installation Position: Front Strut (Upper Bolt)
• Quantity: Pair (Set of 2)
• Finish: 700hr Salt Spray Tested (Hex Chromate Free)
• Patents: US Pat. 8,544,861; 8,469,375; D783,393; China Pat. ZL 201630012294.X

Fits select 1990-2026 Subaru (including Ascent, BRZ, Crosstrek, Forester, Impreza, Legacy, Outback, WRX, and STI) and 2013-2016 Scion FR-S.

SPC Performance EZ Cam Bolts provide a precise solution for dialing in front camber adjustments. By installing these bolts in the lower bolt position of the 2-bolt front strut assembly, you can correct alignment issues caused by lowering springs, coilovers, or heavy-duty use. These patented bolts replace factory hardware to allow for easy, on-vehicle adjustment, ensuring optimal tire contact and improved handling characteristics.

• Designed specifically for the lower bolt position on 2-bolt front strut assemblies
• Provides easy dial-in camber adjustment for improved alignment accuracy
• High-strength hardware designed to replace factory non-adjustable bolts
• Patented design for reliable performance and safety
• Sold as a pair (includes 2 bolts)

Specifications and Certifications:

• Manufacturer Part Number: 81305
• US Patent Nos: 8,544,861, 8,469,375, D783,393
• China Patent No: ZL 201630012294.X

Fits select 2006-2015 Acura MDX, ZDX and Honda Pilot, Ridgeline.

The SPC Performance EZ Cam XR 18mm camber bolts (MPN 81295) allow for precise suspension tuning on two-bolt strut applications. By replacing the upper factory bolt with the patented EZ Cam, you can achieve up to ±1.75° of camber adjustment without the need for grinding or specialized tools. These bolts are designed for efficiency, making alignment corrections a quick one-man job.

• Strength & Safety: Manufactured from Grade 12.9 steel for superior clamp load and maximum safety factor.
• Corrosion Resistance: Features a Hex Chromate-free finish that withstands 700-hour salt spray testing to prevent hydrogen embrittlement and environmental wear.
• Easy Orientation: Integrated markings on the bolt head indicate lobe position for fast adjustment during alignment.
• Adjustment Range: Provides up to ±1.75° of camber change.
• Specifications: Replaces 18mm OE bolts; Part Number 81295.

Each kit contains one pair of bolts, sufficient to adjust both sides of the vehicle. These are essential for correcting alignment after suspension work or to compensate for component wear.

Fits select 1983-2026 Acura, Lexus, Pontiac, Scion, Subaru, and Toyota vehicles equipped with two-bolt struts.

SPC Performance EZ Cam XR bolts provide a precise solution for vehicles with non-adjustable two-bolt struts, allowing for a camber change of up to ±1.75°. These 17mm replacement bolts feature integrated head markings to indicate the cam position for maximum change, paired with a specialized toothed washer that secures your setting for either positive or negative camber correction.

Designed to streamline the alignment process, these bolts turn a difficult repair into a one-man job without the need for time-consuming grinding or slotting. Installation is straightforward: replace the upper factory bolt, loosen the lower bolt, adjust the cam to reach your target specification, and torque all hardware to complete the job. This pair of bolts is essential for correcting tire wear and handling issues after a strut replacement or suspension modification.

• Provides ±1.75° of camber adjustment for improved handling and tire life
• Replaces 17mm factory strut bolts for a direct fit
• Head markings and toothed washers ensure accurate, repeatable settings
• Complete kit includes one pair of bolts for a full front or rear axle
• Manufacturer Part Number: 81290
• US Patent Nos. 8,544,861; 8,469,375; D783,393

Fits select 1980-2026 Acura, BMW, Buick, Cadillac, Chevrolet, Ford, and Genesis vehicles equipped with two-bolt strut suspension systems.

SPC Performance EZ Cam XR bolts provide a precise solution for non-adjustable two-bolt struts, allowing for a camber change of up to +/- 1.75°. These bolts are designed to replace the upper factory hardware, making it possible to correct alignment issues caused by suspension settling, lift/lowering kits, or collision repair. The head features clear markings to indicate the cam position for maximum change, while a specialized toothed washer ensures the setting remains locked once torqued to specification.

Installation is straightforward: remove the upper OE bolt, loosen the lower bolt, install the EZ Cam, and adjust to the desired angle. This kit streamlines the alignment process into a efficient one-person job without the need for grinding or drilling factory mounting holes.

• Adjustment Range: +/- 1.75° Camber
• Installation Time: .4 hr/side
• Hardware: Replaces 16mm OE bolts
• Quantity: Pair (Set of 2)
• Patents: US Patent Nos. 8,544,861; 8,469,375; D783,393; China Patent No. ZL 2019630012294.X
• Manufacturer Part Number: 81280