Originally Posted by shockin330i
Only thing is, if you delete that cat, there aren't any after that. The n55 on the 335i has no cats or res on the pipes.
Hmmm, power delivery would be a lot better IMO if the cat was deleted. Imagine that, no more restrictions. May sound better as well. I would take a free-flowing exhaust any day!
However, there might be drawbacks when the cat is deleted:
1) Maybe too loud for some.
2) The cat should be re-installed when it's time for a smog check.