TwinTurbo.NET: Nissan 300ZX forum - Quieting interior noise and drone from Billy Boat System
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Subject Quieting interior noise and drone from Billy Boat System
     
Posted by Pittsman on September 23, 2017 at 8:56 AM
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Message Just installed a Billy Boat exhaust system in my 91 NA Z. Works just fine but too much interior noise and drone even with my choice of "road" muffler. The system already has 2 resonators /pipe. I'm thinking of lining my trunk area with Damplifier Pro sound dampener sheets. Anyone out there use them and how were they on interior noise suppression?

     
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