Downpipe Kit with 200CPSI Racing catalyst for BMW M2/M3/M4 F80/82/83/87made out of high quality stainless steel 1.4301 (SS304)complete Ø3 Inch and adapter for stock exhaustRacing Metal Catalytic Converter (200CPSI with high quality EURO 6 coating)100% perfect fit, replace OEMless thermal load on the turbochargermore power by reducing back pressuresignificantly more torqueError display in the DME possible.
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