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You will have a little more valve and combustion noise and the headers will change the exhaust note some. Nothing to write home about. I found the most exhaust note change to come from a heads / cam swap.
Adds a nice shot of testosterone to the anemic stock system with non NPP exhaust. With NPP(open) and headers it sounds ferocious.
Yeah, I have long tubes and the Z06 mufflers with the "mod" and it's hellacious when open at high rpms. I have the remote mounted in the beverage cubby for close encounters of the law enforcement kind.
I went from just SLP Loudmouth's to Catless LG Pro Longtubes, and the noise probably increased 3X, it's also alot deeper. When I was on the dyno on Friday the sound was ear damaging loud.
I have almost no drone with my BB Fusion exhaust, otherwise stock. I have the mild2wild ability. If I put in a lethal Z cam and long tube headers, will I lose my ability t quiet it down? Dont get me wrong I want loud, but just not all the time.