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Exhaust
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Mufflers OEM Replacement
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45”/750 cc & Singles
45”/750 cc & Singles
The GasBox Twin Tube Mufflers
Top quality reproduction of the distinctive Twin Tube muffler as originally used on 1930 D-model 45”/750 cc sidevalve twins and 1930-1934 singles. Complete with its clamps.
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The GasBox Fishtail Mufflers
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The GasBox Fishtail Seamed Mufflers
Very authentic reproductions of the original mufflers with correct details like the spot-welded bottom seam. These are very hard to tell from the factory equipment and accepted by the AMCA on restored motorcycles.
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The GasBox Straight Mufflers
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The GasBox WRTT Racer Mufflers
Standard equipment on the Flathead street racing model, the WRTT. Actually not a muffler because it has no restriction whatsoever and is therefore allowed for use on racetracks only.
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The GasBox WR Turn-Out Tubes
Turn-out end piece which was original equipment on WR factory competition models. Fits all 1-1/2” head pipes of 45 cui. models. Guaranteed to have no muffler effect.
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Fishtail Mufflers
Reproduction of the original sytle exhaust muffler as used on 750cc Servi-Cars from 1933-1973.
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