Well after careful debate and reasoning with myself. I've come to realize something.
I want boost.
I can't afford boost though.
I figure I should at least try to get ready for when I have enough cash saved up I can get boosted.
I might be doing my exhaust here pretty soon and since my car has no boost at all I was gonna do 2 1/4 inch dia piping, but since I'm looking to get boosted someday maybe it'd be worth it to go 2.5 instead of having to buy a whole new exhaust system when the time comes. what do you all think?

Forever a work in Progress
I've had 2 2.5" systems, and it might not be optimal in some people's eyes, but by no means is it "too much" for a modded 2.4L. I say do it without hesitation.
15.3 @ 89.97mph, 14's on the way?
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Getrag '00-'02 2.4 8000kms $800
some people that are boosted went with 3 inches

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For the time being, I would say get a 2 1/2". When you get your turbo and your running at a decent PSI, you might want to upgrade to 3" but really 2 1/2" is just fine for a boosted application.
I would only get 2 1/2" now if you really want to get an upgraded exhaust system in the near future.
www.kronosperformance.com / 732-742-8837
yea 2.5" will suit you just fine for sub-300 horsepower. unless you are running over 12 psi i wouldn't even consider 3" yet. but by then you are going to be running into plenty of other expenses so cross that bridge when you get there.
I was a retard, and now I'm permanently banned.