best exhaust diameter to use?

[HC_LXi]

people im plannig doing my next mod,the complete exhaust and im wondering wich diameter to use 2 or 2.25? here are my mod list:
Head Shaved to .050 and worked,integra b18 intake manifold with 2nd gen b16a throttle (60mm),B18 integra AEM CAI,Arospeed FPR.which diameter you guys think that is the best for my mods?

[Bryan]

2.25. Because isn't it 2.5 or 3 that is for turbos?

[HC_LXi]

yep thats what i thought. thanks

[Bryan]

I think you could get away with 2.5 though. It depends. I would just go with 2.25 to be safe.

[Ludi Mali]

2.5 would be the highest you'd want to go. people are pretty much split between 2.5 and 2.25 for NA motors.

[maka_RTH]

i'd say for your current setup to go 2.25. you'd be fine with 2.5, but i think with that you'd notice a loss in low end power, but maybe a slight increase in top. all around, 2.25 will prolly do you best. although i would say if you plan to increase your compression at all in the near future(before you'd feel like spending money on a new exhaust), go 2.5.

[HC_LXi]

Hey thank u guys . i think that i go with 2.25 for now.

[Vanilla Sky]

i'm going with 2.5, but i'm also most likely gonna end up with a custom header...

[maka_RTH]

i'm gonna be going 2.5 as well.., but then again i'm gonna have high compression pistons with port and polished head, b16 intake, and a bunch of other goodies

[PhydeauX]

2.5" with a header and cat. Don't worry about loosing lowend power, its very hard to do with these engines.

andy

[HC_LXi]

thanks people