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 +-1.5deg 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