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 specifications for caster, but SPC recommends 5deg to 6deg of caster as a preferred angle for tracking and return to center on these cars. This kit includes two arms to replace the two front upper arms on the left hand (LH) side. For the right hand (RH) side, use part number #81392. Want to be able to adjust both sides? Use part number #81393. SPC arms feature: Forged 6061-T6 Aluminum contruction formaximized strength at a minimum weightOE style, maintenance free, booted ball jointsLarge 18mm threaded adjuster links Replacement pinch bolts included Need to replace the ball joint boots on tehse arms? We have replacement kits available! Part No. 81354. California Residents WARNING