2.0 and exhaust size

[porn-adkt]

im used to 3.0s and 3" exhausts. Its very nice and can defenatly feel the difference. But im a bit confused if i really need to go that big on a SR20? Would a 2.5 be sufficient up to 350hp at the wheels? Since the lower displacement would mean higher rev to spool correct?

wouldnt a SR20 with a 2.5 exhaust be beninificial in quicker spool, less turbo lag, more quiet and good for up to atleast 300HP at the wheels?

[macidcrook]

with a smaller exhaust you also get back pressure which can slow down the compresser.

[1mns13]

You'll want 3" for 300hp. It will also help you spool up the turbo.

[sideview_180sx]

just buy one already designed for the sr20 or turbo 240sx. Do some research, you may find a common relationship nearly all sr20det exhausts are 3" and bigger.