Most downpipes are 10-15whp,all depends on the design etc etc.

 

dp or s1?

 

my car HATES dynos,,,, and i actually i lost .03 in the 1/4 over a stock open downpipe, but thats going from may (of this year) to august (this year)
but,,,, the quality of rob's products is second to none !!!!!!

 

whats wrong with the injen i heard great reviews about it. also i dont like those cutout dp's.

 

Needswings dp bolts right onto the stock exhaust right?

 

injen bolt right up as well. im not saying bad things about ur dp but what get the most gains?

 

yes it does......

 

blah blah blah, any downpipe will work, 3" is 3" after all, as long as the bends arent extreme its not going to affect HP gains, my ghetto ass homemade downpipe worked just as well one that cost $300 and it never cracked or broke on me once in 2 years of driving....I will be making a new one for my new setup, but thats only because my turbo outlet now exits on the other side of the engine as previously...or I would still use it, IMO though a 3" downpipe while the rest of the exhaust is stock really isnt going to do much for you, if you go 3" go 3" all the way back

 

im planing on doing injen 3" but it cost alot, so it will be awhile

 

perrin....