Quote:
Originally Posted by r33_RGSport
You won't get any performance difference under stock or mild tune.
You will need aggressive tune to take advantage of bigger diameter.
But then, you will be stuck with a bottle next in the mid-pipe and muffler.
Proper way is to go big all the way from Turbo to tailpipe.
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Be careful a lot of brands out there taper to under 3 inches in certain spots on their pipes. Ours are 3.5 at the turbos with a smooth step design transition to avoid any turbulence going into 3 inch all the way to the exhaust
