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I was looking into buying muffler valves for my 2006 base model C6 to beef up the sound, and was wondering what some of the best ones were for a reasonable price.
It's another word for cut-out, usually electric. I think a few guys on the forum have tried them, but I have never heard positive feedback. One of the problems with a C6 is a lack of space. Everything is tucked in so well that finding a place to put a 4" elbow/stub, then splicing an electrical valve into the existing pipe....pretty tight.
Just adding the vavle to the stock non NPP muffler tips will not increase the sound.
Hence the one tip on the NPP muffler has it own piping that goes through the muffler on it own, and what that tip gate is opened, its the tubing in the muffler that makes the muffler(that tip) louder.
So on stock muffler, just have the one pipe that does the full once around the muffler, and both tips are coming out of the rear chamber section only.
As for cut outs, think twice about it, since it does not add any HP, and just makes the vet sound like a loud trash truck instead.
In the video, the camera is mic damping a great deal of sound, from the sound clip of when the gates are closed and just on mufflers, and your not really hearing the huge increase in sound level with all the pitching/cracking/popping going on as well too.
So maybe on a track or out in the country making that much noise, but you run cut's out open in the city, and your going to be pulled and ticketed in a mater of mins.
New member with only three posts......welcome to the forum.
As I see it, he's gotten the information he was looking for and people are having a little fun.
I looked into cutouts and found too many complaints about functional issues; mainly not fully closing and therefore leaking. When I wanted an exhaust that was quieter than the BB PRT that was on my car when I bought it, it was a no-brainer to pick up an NPP and an NPP In a Box kit. Noise when you want and blissful stock quiet for long highway trips.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
