I have flow master Am. Thunder axle backs. I get a large amount of cabin drone when rpms drop. Solutions?

Asked by Mar 18, 2015 at 01:47 PM about the 2012 Ford Mustang GT Convertible

Question type: Car Customization

1 Answer

210,775

Around 2000 rpm? Pretty much normal, because the mufflers are the same size on the new setup, the stock mufflers are slightly different. Try a set of new rear gears to get your cruising RPM up a little bit, to 3:73:1 or you can add a resonator to your exhaust. It's been discussed for years. Check out www.corral.net for more suggestions.

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