Double your suspension capacity: 9" long base unit is ideal for 1:1 motion ratios

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Double your suspension capacity: 6" long base unit is great for tight spaces with 1:1,2:1 or 3:1 motion ratios.

California Residents WARNING

These heavy-duty axle caster shims can also be used to adjust pinion angle on Jeep CJs and similar vehicles with 1-3/4" to 2" wide leaf springs. 2 degree taper. Six shims per box.

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Use this sliding balljoint to adjust camber on the rear of the Acura MDX for improved handling and tire wear. The OE quality balljoint is easily installed and corrects camber angles ±3°.

California Residents WARNING

Isuzu D-Max and second-generation Chevy Colorado trucks run out of factory camber and caster adjustment when they are lifted. SPC's heavy duty cast replacement arms provide 0° to +4° caster change and ±3° camber change. SPC's patented truck arms offer increased droop travel and free pivoting bushings in an easy to align remove and replace arm. Featuring our long life maintainable ball joint and SpecRide bushings, this arm is designed to correct alignment angles while maintaining factory ride quality. These remove and replace arms are available in pairs for lifted and off-road applications.

Get more droop travel: SPC's arm has improved clearance ot get around the spring bucket when the arm droops, eliminating arm to frame contact on lifted trucks. The maintainable ball joint has an oversized ball and allows more than 80° of articulation to ensure it never binds. SpecRide bushings have free pivot to eliminate any chance of bushing failure seen on many high travel suspensions.

Get your drivability back: When you lift your truck you affect caster and camber. SPC's arms have +1° of caster built into them. Using its patented ball joint design the arm will get you 0° to +4° of caster and ±2° of camber.

Get your tire where you want it in the wheel well: Use adjustment in the control arm and on the OE lower cams to maximize alignment angles and move oversized tires forward in the wheel well to minimize or avoid fender trimming.

California Residents WARNING

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 spring bucket and a full 80° of articulation in the ball joint - more than any other offering available. 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 driveability. The patented ball joint design allows the tire to be positioned correctly in the wheel well and additional adjustment in the OE lower arms can maximize placement for oversized tires to avoid fender trimming. If replacement lower adjustment cams are needed, see part# 25440 or #25435 depending on the year. Sold as pairs. US Patent No. 7,513,514.

Spread the load! "Z" blocks and other axle spacers used by Hendrickson, Freightliner, Kenworth, Mack, Hollis, Sterling, Ford and others create pressure points that will crush or even break the toughest of caster wedges. Use this HD Wedge Spacer Plate to spread the load and then use the caster shim of your choice to modify alignment. The 1/8" thick plate comes 6 to a pack and provides support for 3" wide axle spacers. The HD Wedge Spacer Plate can also be used to dial in ride height from side to side.

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Twice the coverage - half the inventory. Changes caster positive or negative from 1/2 degree to 4 degree. APPS: Any solid axle RWD or 4WD vehicle.

California Residents WARNING

Add camber adjustment to your lifted Jeep Grand Cherokee or Commander with the highest quality ball joint on the market! This joint is specifically designed to work with raised suspensions and features:

*Induction hardened and oversized 18mm stud for extreme strength and high durability

*700 hour salt spray resistant coating for long life

*Hybrid 2-piece race and internal spring compensate for wear over time

*Fully sealed greasable design to protect from the elements

*80° of articulation to maximize travel without binding vs 66° on the factory joint.

* On the adjustable ball joint SPC uses hex chromate free finish and offers a 700hr salt spray test for the best corrosion protection available.

California Residents WARNING

These over-the-road heavy duty adjusters are a fast and accurate means to align front or rear axles of most popular tandem trailers and trucks. You now have reliable means to complete total heavy duty truck alignments. Spacers for Kenworth Air Glide "Eight Baggers". Six shims per box.

California Residents WARNING

These over-the-road heavy duty adjusters are a fast and accurate means to align front or rear axles of most popular tandem trailers and trucks. You now have reliable means to complete total heavy duty truck alignments. Spacers for Kenworth Air Glide "Eight Baggers". Six shims per box.

California Residents WARNING

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 clearnace 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 clearnace to get around the spring bucket and a full 80° of articulation in the ball joint - more than any other offering available. 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 driveability. The patented ball joint design allows the tire to be positioned correctly in the wheel well and additional adjustment in the OE lower arms can maximize placement for oversized tires to avoid fender trimming. If replacement lower adjustment cams are needed, see part #25440 or #25435 depending on year. Sold as pairs. US Patent No. 7,513,514.