Hi everyone,
I have a 2003 1500HD Chevy with a 6.0L. I had the stock muffler replaced with with a Dynomax muffler. The sound is great when I accelerate, but when I'm at a constant speed I get a drone and alot of resonance in the cab.
I've talked with Dynomax, Flowmaster, and Magnaflow. They all say that the 6.0L is a very loud engine. The Flowmaster rep went as far as to tell me that they no longer recommend their product on the 6.0L.
My muffler shop has talked with his distributors and they suggested the Flo-Pro. I've checked there website
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and they have a product designed for the 6.0L and 8.1L GM engines that they say will give a performance sound without the drone. Does anyone have any experience with the muffler for the 6.0L or if not just Flo-Pro in general? I've heard that the sound is not as good as Dynomax, Flowmaster, or Magnaflow.
Your help is greatly appreciated.
Tom