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      12-09-2007, 03:33 PM   #10
hotrod182
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Drives: 2023 i4 M50
Join Date: Dec 2006
Location: California

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Okay, I just went outside to take a closer look. Before I start my car, the valve is open on the left muffler. After I start the car, the valve closes (you don't feel any exhaust pulsation). But after about a minute of idling ,the valve opens again, you can feel the exhaust on your hand, and the exhaust note deepens. Normal??
Appreciate 0