The DBA 5000 Series slotted ring for 2005–2009 Audi A4 sedan front with NAS nuts is a two-piece replacement ring featuring the T3 bi-directional slot design. It's part of the 5000 Series performance ring lineup, combining slotting advantages for pad bite and gas evacuation with the practicality of replacing only the ring in two-piece rotor setups, preserving hub components where compatible.
DBA 05-09 Audi A4 Sedan Front 5000 Series Slotted Ring w/NAS Nuts