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intake/header/exhaust how much gain?

10K views 13 replies 14 participants last post by  graves.z 
#1 ·
just wondering how whp gain do you get from the basic bolt ons (i/h/e)
 
#10 ·
Umm... Intake has been dynod at 5-7whp, exhaust has been dynod at 4-5whp, and the header has been dynod at 10-12 whp.

This is just what I have read many times... if it's false, it's false, but I know I have those mods, plus a few more, and my spec is a hell of a lot quicker than a stocker. Flame away, I don't care.
 
#11 ·
Word, header dyno's at 11whp by nissan sport. My intake dyno'd at 7 1/2 whp by K&N, and cat-back I haven't actually seen. So you figure with just those two parts of mine, I'm already at 16+ and I've only added more. Flame on guys, it's all over the net man.
 
#13 ·
Well these cars pick up alot with full exhausts.Think about it you are dropping two cats and in my opinion 2.5s need at least a 2.3ish exhaust to breath right.2.5 i think is perfect.Im not sure what stock measurments are but compared to my aftermarket its tiny as hell.
 
#14 ·
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