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Old 02-17-2010, 11:48 AM   #7
WildBillyT
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Quote:
Originally Posted by BigAls87Z28 View Post
Corvettes NPP exhaust uses a vac system that opens valves in the muffler to divert gases throught the muffler.
This is just a spring
Yeah, that is my beef with it. With all of the water vapor going through a muffler I can't imagine it lasting long. It would still work I guess, but not as good.
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