View Single Post
      12-15-2009, 05:56 AM   #13
Brigadier General

cstavaru's Avatar
Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania

Posts: 3,237
iTrader: (0)

Originally Posted by XPO186 View Post
Has anyone tried a 2ndary cat delete with the BMW perf exhaust?
I think I will try, because when installing the performance exhaust, the midpipes get sectioned and its very easy to replace them. But are there sensors detecting the presence/absence of catalytic activity, like on the downpipes ?