Quote:
Originally Posted by msorenso
Have of course a ZR1 with dual 3 inch pipe and magna flow mufflers from previous owner. Headers with no cats. It is very loud and cant stand the deafening sound and drone anymore. I have just purchased dynomax racing bullets for right off the headers and dynomax ultra flow ss mufflers for the rear. I hope this combo quiets it down a bit. Any thoughts? Thank you!
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The Z06 exhaust NPP valves work well with the UltraFlows. That's what I currently have on my car.
You can see hear in this video how the NPP system mitigates the sound. At cruise, they do are great job at eliminating drone. Also significantly less expensive than Corsa, larger diameter, less weight.
