I kind of like this setup and wonder how hard it is to install, I heard the q300 had some ratting issue's due to clearance. I am concerned about being to noisy. Its looks like the rv6 catted is a extremely well made downpipe with a cat. The other exhaust is the Ultima racing 3" with cat and a catback with two muffler's-makes more power but might be just to noisy and lack of room of the downpipe worry's me. Either setup I would add a rmm 70a hasport. I have a tuner and a 3.5 CAI.