Got resonance? Want more? Flowmasters are the answer.
All kidding aside, I had a pair of 50 Delta Flows on a 69 C10 longbed with tailpipes running back to the bumper. Even with a crossover pipe, those things caused resonance out the *****. Eventually went to Walker Dynomax Super Turbos with 20" case, which have a subdued rumble, more like OEM performance mufflers with minimal resonance. And a test run by David Vizard showed them to have less back pressure than Flowmasters (probably the originals). I like the Dynomax mufflers so much, I put the same model number on my 82 C10.
Speaking of my 69 C10, it's now my son's. When he had the truck semi-restored by S&S Motorsports in Sarasota, they installed a pair of Magnaflows (I don't know the model number.) They are probably 7-8 out of 10 on the loudness scale, but they sound really nice and have surprisingly little drone. No beer can sound, just old school rumble.
Gotta brag on his truck here!
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