Currently running a revhard manifold with a precision 5431 turbo. Currently at 8psi with a 2.5inch downpipe to a 70mm testpipe and a 70mm invidia n1 dual.

After spring I am going to get it retuned and install the boost controller to run more boost. Should I stick with the exhaust setup I have now, purchase my friends modified 2.5" straight pipe with a resonator, or possibly upgrade to the megan 3" single exhaust.

Even though Im running a 2.5" downpipe will I notice any differences between any of these?

 

I think with any turbo, 3" is the way to go.

 

If I'm not mistaken, Joey is making well over 600hp on an Invidia single. Might not be ideal, but I think you'd see more power putting that exhaust money into a better manifold. Even a Fullblown or Pfab log would net more power with a boost controller and a retune.

 

Well I jsut measured for the first time and it seems like I have a 2.5" test pipe to a 2.25 inch invidia. Luckily I didnt really pay anything for it so what do you guys think?