im getting a new manifold on my 2001 prelude... ive been thinking about getting a 3in downpipe made since my current 2.5in one wont work with the new manifold because of the way it sits... my ? is would it be worth it to get a 3in downpipe and have a open dumptube on the wastegate with my current cat-back which is the greddy evo2?... the piping on the evo is 60-70mm so would getting a 3in downpipe make any difference or should i stick with the 2.5in? btw in running a t3-t04e turbo at 9psi...

 

a 3 in will not clear the front crossmember

 

thats funny, ive got a 3 inch downpipe on my lude