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 � 70mm *ECU will need to be coded to avoid engine management light errors.