Originally Posted by e92_m3
Yup, that's where a test pipe comes in...
Is a test pipe in the works as we speak?
A test pipe would really open up the exhaust. An EVO IX with an intake, header, test pipe, and a tune really turns it to a different animal. A lot of EVO owners would know that's a fact.
I know it may not be easy, but try applying the same thing to the N55...
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.