40 series Flowmasters are built to be loud. No surprise at all there. Their 50-60-70 series mufflers give great sound / performance and little to no drone.
40 series Flowmasters are built to be loud. No surprise at all there. Their 50-60-70 series mufflers give great sound / performance and little to no drone.
Super 40's = drone in cab, no doubt about that. I love my 50 series Flowmaster, other than the previous one rusting out, no issues whatsoever! I replaced it with a SS 50 series this time. No drone in the cab and still a great rumble.
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