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REDSTAR downpipe for Audi RS3 8V1 TTRS 8S Pre-Facelift models only. Optimized single-tube design, eliminate both primary and secondary catalytic converters, provide a huge increase in exhaust flow and will allow for a significant power gain.
Catless only - Removing of factory catalytic converters will trigger a сheck engine light (can be eliminated with optionally O2 sensors restrictors). Firmware update recommended to get maximum performance gains.