04-20-2020, 09:50 PM

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Chief Ponti-yacker

Join Date: Nov 2009

Location: Idaho

Posts: 699

71 GTO muffler

I have a 71 GTO with the 455 cid (not HO) engine, RAIV manifolds and a 2 1/2" Flowmaster exhaust with H pipe and Flowmaster mufflers (17" case).

Does anyone have a recommendation for a louder muffler replacement than the Flowmasters; they seem pretty quiet while cruising and accelerating. They do drone some at 55 mph but not really annoying. I researched thru previous posts and didn't see a Flowmaster replacement experience.

Any recommendation would be appreciated.

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