Quote:
Originally Posted by norb335i
Hi All,
I like this simple mod and its effect on the sound of the exhaust. However, I keep wondering whether this has any adverse effect on the engine in the long run. I'm sure the flap is not there only to control the sound of the exhaust at low and high RPMs, but mainly to regulate the pressure and performance...
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I have been wondering this as well...could there be any performance benefit to having the valve open and close?