new exhaust

[WazR32GTSt]

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.

[WazR32GTSt]

keep in mind its an r32gtst (so 2.0L engine, not 2.5L engine) and exhaust flow will be less to that of an r33gtst...