Lacy Croft Jr. Posted October 13, 2022 Report Share Posted October 13, 2022 I have a 2008 Shelby GT500 convertible with a Flowmaster exhaust system. At various RPM/speeds the drone noise inside the cabin is deafening. Outside side the car the sound is great. How can I fix that? Quote Link to comment Share on other sites More sharing options...
John Canfield Posted October 17, 2022 Report Share Posted October 17, 2022 Flowmaster uses a thin wall material for their mufflers. Magnaflow is a thicker wall muffler, my preference is MRT ( https://www.shopmrt.com/ ). They do some amazing work while keeping the drone to a minimum. Quote Link to comment Share on other sites More sharing options...
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