I tend to run one muffler now on my old 123s. If the rear one dies I replace it with a custom made pipe. If the middle one dies I replace it with a custom made pipe. The increase in noise running one muff instead of two is hardly noticable.

I have not tried running without any muffs....I tried that on my suburban once. It was way too loud. My wife made faces. ....me too.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.