Hey all!
I have a U12 Ka24e auto.
Currently have stock headers that need replacing, looking at tuned extractors though.
I also currently have a 2.25" Catback pipe with a straightrough.
My question is, Would going to 2.5" be worse performance wise?
or would it be a good idea?
The reason I'm asking is that a friend mentioned something about larger pipes not being good on auto's.