The DBA 5000 Series two-piece drilled and slotted front rotor for 1999–2004 Audi A6 Quattro 4.2L is a direct replacement that pairs high-carbon cast iron rings with aerospace-grade T6061-T6 aluminum hats, joined using NAS-standard fasteners. That construction cuts unsprung weight, improves heat management versus one-piece discs, and is recommended for high-performance street, track day and club racing use.
DBA 99-04 Audi A6 Quattro 4.2L Front 5000 Series Drilled & Slotted Rotor w/Gold Hat