when the tax return comes in, i will be in the market for a new cat-back exhaust...
currently:
have a 3" dump/front on the standard r32 turbo, and have the stock cat-back into a 2.5" straight through muffler... won't ever be running more than 13 or 14psi through my FMIC (and with gtr cams this week!)
so brings me to the question: do i go 2.5" cat-back or 3" cat-back?
for the exhaust flow i require will a 2.5" cat-back be sufficient? i have read articles of sr20's and other 2L engines making good power with a 2.5" exhaust so would 3" just bo overkill with unnecessary cabin resonance?
or will the extra diameter of the 3" over 2.5" make a big difference?
if i choose the 2.5" i can just change the pipe and leave my current muffler and that will save on money a bit...
what do you think?
cheers,
Waz.