So you guys who say it's no more loud/annoying than stock seem to be the ones leaving the stock cat in place. From all my experience in dyno testing my cars pre/post catalytic converter, it's painfully obvious that a cat hurts performance. Especially in anything that uses forced induction. So why upgrade your exhaust at all? Just for sound (ricers!)? LOL!
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2006 Mega 2500. Smarty, XZII, HOT J/A (gauges), HTS trans, Edge TC, GM gov sol, AirDog II, Silverline muffler, 35's on 18's, 4" lift, -cat, -baffles, -silencer.
2001 Corvette C5. Tuned by BLUECAT.