The Downpipe-Kit fits in to:

BMW M135i 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
catless*

*Off-road use only unless catalyst fitted in exhaust mid-section.
Removal of all catalytic converters will almost invariably make your vehicle illegal for use on a public road.
ECU will need to be coded to avoid engine management light errors.