BMW 3-Series (E90 E92) Forum - View Single Post - Best Cat-back exhaust systems for 335i Xdrive Coupe?

335ixdrive2009 · 12-11-2012, 03:42 AM

Thank you all so much! I am 90% sure I'm going with catless down pipes. Do they drone at all? It is safe to run a stage 1 cobb tune with the catless downpipes right?
Thank you again

12-11-2012, 03:42 AM	#18
335ixdrive2009 New Member Drives: 2009 335i Xdrive Coupe Join Date: Jul 2012 Location: San Diego, CA Posts: 29 iTrader: (1)	Thank you all so much! I am 90% sure I'm going with catless down pipes. Do they drone at all? It is safe to run a stage 1 cobb tune with the catless downpipes right? Thank you again