The Downpipe Kit fits in to:

BMW M135i(x) F20 / F21 till 06/2013
BMW 335i(x) F30 / F31 / F34 till 06/2013
BMW 435i(x) F32 / F33 till 06/2013

Replacement for OEM BMW Part# 18328603875

made out of high quality stainless steel 1.4301 (SS304)
100% perfect fit, replace OEM
less thermal load on the turbocharger
more power by reducing back pressure
significantly more torque
200CPSI catalytic converter
connection diameter 105mm