Quote:
Originally Posted by FPenvy
That statement makes no sense based on it being a boosted setup. You want no back pressure with turbos. NA and supercharger setups want the back pressure.
Plus with how quiet turbos make a car I'd be tempted to run just open down pipes haha power and noise 
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this was taken from infinit50.org or whatever and was a stillen post in regards to a dual 3'' cbe
We are almost done with our new exhaust specifically for the Q50 TT. There is definitely a big restriction in the Cats. The Primary doesn't have a huge pipe diameter restriction, but the secondary necks down to 1.5 inches. I can't say how your setup will sound, but there is really no reason to do a 3inch dual setup. The engine and turbos aren't big enough to make sure of it and it might just hurt power.