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Not much...5-10 hp. :(
 

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Discussion Starter · #3 ·
so the car is only going to pick up 5-10? Damn, on my 331 stroker I saw gains of 20hp with the x-pipe and 8 from catback. Are the stock one's pretty good then? I am almost afraid to ask what a cold air intake would net.
 

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You're best bet is to do long tube headers, catback, x-pipe, and cold air intake at the same time. You should pick up 30 rwhp with those mods. Get a tune and you'll do a little better. When I added my catback on my stock motor...I didn't pick up anything but a loud exhaust. :lol:


I just re-read your first post...you might pick up a little more with it being a C5 and not a Z06...won't be much more though. :cheers:
 

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5.4 speedster said:
How much power would a bone stock 2003 c5 auto pick up by installing a corsa exhaust and a corsa x-pipe?
C5's Factory catback system is more restrictive than the Z06 system. Expect gains around 12 to 13HP. :cheers:
 
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