I'm not sure if it is really worth it to get a header. I had an LS before with a 4-2-1 header and that seemed like it made a difference, but then I switched to a 4-1, and didn't notice ****. Now I have a gs-r, and don't know if I should or not. I read the dyno pages in import tuner some time ago and the addition of a header on a gs-r netted less than three horsepower.

So if anyone has a dyno, please post it.........thanks

 

do a search on here for the great header test.
it was done on an ITR but you'll get the basic idea

 

i've seen the great header test, but thanks

 

i have heard that 4-1 headers work better on a gsr but noton a non-vtech. iono, thats just what i hav read. sorry