Is it possible to run a straight through exhaust to free up power or would that rob power.

 

depends....

do you have a forced induction system or are you running NA

 

if you stay naturally aspirated, do it at 2.25" and you'll get the most gains
any low boost (under 1 bar) setup you'll want 2.5".... once you hit the 1 bar point i'd recommend a 3" setup

 

Well I just had my exhaust done today and it sounds great!! I ran a 2 1/4" straight pipe from the S pipe back so now that I am running this setup and a DC Sport header the only thing that is restricking me is the S pipe and I have already ordered it and just waiting for it to show up. Oh yeah if anyone is thinking of doing this same setup put a resonator because there is a little high pitched rattle sound with out one.