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The DBA 5000 Series replacement ring for Audi A4 (2005–2009) front applications is part of a composite two-piece direct-replacement rotor that combines a high-carbon cast-iron ring with an aerospace-grade aluminum hat. The HD finish provides a smooth OE-style appearance while T6061-T6 hats secured with NAS bolts and crimp nuts reduce unsprung weight and improve heat isolation for high-performance street and occasional track duty.
DBA 05-09 Audi A4 Front 5000 Series Replacement Ring
