The Downpipe Kit fits in to:BMW M135i(x) F20 / F21 till 06/2013BMW 335i(x) F30 / F31 / F34 till 06/2013BMW 435i(x) F32 / F33 till 06/2013Replacement for OEM BMW Part# 18328603875made out of high quality stainless steel 1.4301 (SS304)100% perfect fit, replace OEMless thermal load on the turbochargermore power by reducing back pressuresignificantly more torquecatlessconnection diameter 105mm*ECU will need to be coded to avoid engine management light errors.
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