My tinnitus has the same frequency as a 6-71 jimmy turning 2400RPM. We had to have the windows down in the summertime. The Flowmaster on my 3800 will be replaced before my next trip come spring.
1951 3800 1-ton "Earning its keep from the get-go" In the DITY Gallery 1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.