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The DBA 5000 Series slotted ring assembly for 2005-2009 Audi A4 Quattro front brakes is a two-piece direct-replacement rotor combining high-carbon cast-iron rings with aerospace-grade T6061-T6 aluminum hats secured with NAS hardware. The T3 slotted face option provides enhanced cooling and structural support while aluminum hats reduce unsprung weight; DBA offers both complete assemblies and replacement rings.
DBA 05-09 Audi A4 Quattro Front 5000 Series Slotted Rotor w/Black Hat
