How to Install Audi S4 Calipers on an A4 1.8T (B6)
A cost effective brake upgrade is to replace the single piston calipers with the two piston calipers that are found on many different Audi models, such as the D2 A8, C5 A6 with 2.7T engine and B5 S4. The B6 A4 upright has the same caliper bolt spacing as the B5 S4, so the caliper bolts right up....
