Honda Car Forum

How many HP would i expect?

yep, about 20 more horsepower, for a total of 30.

Ha don't listen to punks. rsx is a nice car man. I'm saying if you get headers u would expect to get a 10-25 hp increase.go with Greddy SUS headers they look sic. lookin in the 220-250 range with exhaust

Check out www.clubrsx.com for RSX info.

about 20 hp gain, of course you need the intake and exhast done as well, almost no point throwing a header on without letting the rest of the motor breath better too.

I have never seen a street legal header give 20hp to an RSX, maybe if it had a turbo and needed to relieve some back pressure but not on a NA car. Expect anywhere from 5-10hp at high rpm.

The HP varies with whatever header you plan on installing.Some companies can guarantee up to 25+ HP others (normally) around 10 to 15+ HP. Also the real question is; where do you want that HP to go to? The high end, mid range, or the low end? But don't just get a header, add the exhaust and the intake. Honda mathematics: Intake volume + headers + exhaust = HP

you will barely feel any difference. But if you take it to the track,record your times before and after the header swap,you will see the difference in the numbers.