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.
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.
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.
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