The Downpipe Kit fits to:

BMW 135i E82/E88
BMW 335(x)i E90/E91/E92/E93

made out of high quality stainless steel cast 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 with EU6 coating

Error display in the DME possible.