Ok, so I know that most headers don't do much, or at most add a few hp in the midrange of the powerband. However, I've seen it said several times that "Headers don't give you good gains unless you are S/C". So, what kind of gains DO you get with headers alone on a FI vehicle?

An extra 15, 20 hp? more? less?

Anyone have a dyno before and after a header install on a car that was previously supercharged?

Since most headers actually LOSE power on the extreme top end, aren't you kind of shooting yourself in the foot putting aftermarket headers on a car that (with a S/C) is all about really maximizing top end power?

 

Zero gains here adding a Toda header.

 

I've never dynoed my car so these are only my "impressions".
I also have the Toda header, one of the most expensive on the market. After I put it on my Vortech engine, I felt nothing. In fact, I "felt" more of a gain when I took the cat off.

 

No dyno either, but I did notice a difference when adding a Mugen header and exhaust, together. But that could've been as much the combo of weight loss and hp than just hp.

 

My wallet was much lighter after a Toda and Vortech. Not much else though.

 

oh wow thankx for saving me some cash fellas

 

and xviper, i just noticed im 6 days older (s2ki age) than you!!! hehe. not counting lurking days.

 

Duplicate post

 

wow ok internet is screwing up. thats my excuse for still being a noob to the forum

 

You GEEZER!

Maybe slow will see the duplicate and delete it and your last post.