The WAGNERTUNING Downpipe Kit fits to:

BMW 335d E90/E91/E92/E93 (2006-2011)
BMW 535d E60/E61 (2006-2009)
BMW 635d E63/E64 (2006-2010)
BMW X3 E83 3.0sd (2006-2010)
BMW X5 E70 3.0sd (2007-2010)
BMW X6 E71 35dX (2007-2010)

Replacement for OEM BMW Part# 18308508523

made out of SS304
100% perfect fit, 1:1 OEM replacement
less thermal load on the turbocharger
more power by reducing back pressure
significantly more torque
Ø 70mm

*ECU will need to be coded to avoid engine management light errors.