The DFC premium front-left caliper for 1999-2005 Audi S4 applications is a silver zinc-coated brake caliper intended for the left front position on supported S4 models. It serves as a replacement for a worn or damaged front caliper in the stated year range and includes a silver zinc finish to keep the exposed surface visually consistent with other braking components.
DFC 99-05 Audi S4 Front-L Silver Zinc Coated Premium Caliper