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Product reviews for Flo-Pro 4" Down Pipe Back Exhaust - Stainless GMC/Chevy 6.6L Duramax 2001-2007
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Existing reviews
Droning sound
At a certain speed and rpm there is a very irritating droning sound that goes right through you under heavy load. Normal driving no load it was fine. I am going to have to change out the muffler to something different. Other than that easy to install and looks great.
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