Also, short tube (short length) headers are better for horsepower in the higher rpm ranges. Long tube (full length) headers help create more torque in the lower rpm ranges. Mine are long tube (full length).
My entire setup is 2.5 inch, my mufflers are single in, single out, they Flowmaster Super 44's, dual chamber with "delta flow technology" (like I care about that lol). Under normal driving, it sounds healthy and good, not annoying, cruising about 45 or above, windows up, radio at a comfortable level, I can't hear it at all, it just kinda fades out and is quiet. Windows down, radio off, it is audible but pleasant and not annoying. When I get on it or floor it, it comes alive and makes all kinds of wonderful, joyous noise and commotion.
By the way, it's the second loudest street muffler Flowmaster makes. Flowmaster's loudest street muffler they actually recommend not using on the street. That's the Super 10, single chamber.
Overall I'm very happy with my choice in mufflers.
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