It's so quiet now man, we could have a full conversation when it's on noise... I didn't even need earmuffs in the dyno room!
Of course man, I'll take it to the drags one night for shits and giggles, I'll give you a heads up too!
Well the entire system is 3.5" till the rear muffler at 3.25"... the front section of the cat back was chopped off and replaced with a 3.5" Hurricane round muffler.
Exhaust system wise, I think it's flowing just right.. I have the option of dropping the gate plumbing back into the system.. but with the power achieved and the boost response I doubt that there's much back pressure.