Adjust front camber and caster +-1.5deg on the Audi C8 platform with these forged aluminum adjustable control arms from SPC. OE style booted ball joints and bonded rubber bushings maintain factory ride, handling and noise, vibration, & harshness (NVH) parameters. Audi's unique multi-link suspension creates a 'Virtual' SAI. The factory does not publish a specification for caster, but SPC recommends 5deg to 6deg of caster as a preferred angle for tracking and return to center on these cars. The kit includes two arms to replace the two front upper arms on the right hand (RH) side. For the left hand (LH) side, use part number #81391. Want to be able to adjust both sides? Use part number #81393. SPC Arms Feature:Forged 6061-T6 Aluminum contruction for maximized strength at a minimum weightOE style, maintenance free, booted ball joints Large 18mm threaded adjuster linksReplacement pinch bolts includedNeed to replace the ball joint boots on these arms? We have replacement kits available! Part No. 81354. California Residents WARNING