CMI Mufflers / Sound Choice System

Custom Marine Inc. (CMI) is the top name in the marine jacketed exhaust header market. CMI now offers a variety of stainless steel marine exhaust mufflers for most high performance marine applications. CMI Sound Elimination mufflers clamp on or through transom mount for extremely quiet idle operation and utilize spring loaded baffles for minimal restriction at top speed. CMI Sound Choice is a compressed air operated switchable system that diverts exhaust gasses through the Mercury Transom Assembly via the factory bullhorn.