So, I have money enough for either right now...

tomorrow morning i'm gonna go deposit my check and make a purchase, the header will be more of a pain to install for sure, but which will yield better gains?

also... is the downpipe really THAT big of an upgrade, like.. what gains are found in getting a test pipe(#s please!)


**coupling with an hks axle back, no other exhaust mods yet**

 

I installed a header, test pipe and b pipe at the same time with no axle back. To be honest there is little difference even with both, so one or the other won't add too much. My seat dyno tells me maybe 10-12 hp for both header and test pipe. I doubt the b pipe adds anything noticable. I have heard a bigger gain with the header but I bet they both unlock about 5 or 6 hp.