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 shims are for any solid axle 2WD or 4WD vehicle. For 2-1/4"-2-1/2" wide leaf spring, 4° taper. 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

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 area 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

These Peterbilt Air Leaf Adjusting Shims adjust thrust angle and toe by placing the shim between the spring hanger and the spring. Six shims per box.

California Residents WARNING

These Peterbilt Air Leaf Adjusting Shims adjust thrust angle and toe by placing the shim between the spring hanger and the spring. Six shims per box.

California Residents WARNING

These Peterbilt Air Leaf Adjusting Shims adjust thrust angle and toe by placing the shim between the spring hanger and the spring. Six shims per box.

California Residents WARNING

Get ready for the track with this four (4) arm set of adjustable upper links for the Audi C8 platform. This kit has four arms so you can change camber and caster ±1.5° on both sides. xAxis seales flex joints replace the compliant inner bushings with a free pivoting, minimum compliance, joint. You will fee the difference in handling.

Forged 6061-T6 Aluminum contruction for maximized strength at a minimum weight
OE style, maintenance free, booted ball joints
Large 18mm threaded adjuster links
Replacement pinch bolts included
xAxis sealed flex joints replacing overly compliant OE inner bushings with a free pivoting, minimum compliance, joint

Don't need the added benefits of our performance arms? Use SPC arms with OE type bushings - part #81393 for two sets of arms to correct both sides of the vehicle, #81391 for the left side, or part #81392 for the right.

Need to replace the ball joint boots on these arms? We have replacement kits available! Part No. 81354.

Warning: You will also hear the difference, the OE bushings are designed to absorb and negate noise, vibration, and harshness (NVH). This set of arms will transmit road noise into the cabin.

California Residents WARNING

Adjust pinion angle on the drive axle of your Peterbilt Low Air Leaf with 'Z-Springs' using this 1.0° shim. The OE shim is aluminum and does not last under load; the SPC Zinc shim is built to last.

California Residents WARNING

Adjust pinion angle on the drive axle of your Peterbilt Low Air Leaf with 'Z-Springs' using this 1.5° shim. The OE shim is aluminum and does not last under load; the SPC Zinc shim is built to last.

California Residents WARNING