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CMI INDUSTRIAL MUFFLERS

CMI Silencers and Mufflers

CMI offers a complete line of silencers and mufflers to fit most high performance exhaust system applications.  All CMI exhaust attenuation systems are built using 300 series stainless steel and are fully polished to a mirror finish.  SPECIAL NOTE: Some exhaust attenuation equipment may not be authorized for use in your area.  Please consult local and regional ordinances prior to purchasing any model.

 

CMI Sound Elimination Systems™

CMI Sound Elimination Systems mufflers offer proven sound reduction technology that enables boaters to operate their performance boats in areas where sound emissions are restricted. This system should reduce sound emissions to levels as low as 85 decibels (dB) in many applications, which is below most sound emission regulations. The mufflers are engineered to reduce sound without restricting the exhaust or creating unwanted backpressure, which can inhibit the engine from reaching peak performance power. Mufflers can be installed on any exhaust system with tailpipes ranging from four to six-inches in diameter, which covers the full range of inboard or stern drive-powered recreational and performance boat applications up to 1200 horsepower. CMI Sound Elimination Systems mufflers are made from 304 series stainless steel, and have fewer moving parts than competitive models to ensure long-lasting durability and reliability for nearly any application.

Clamp-on options include a 4” model to fit tip-style tailpipes ; a 4.5 inch model to fit thru-transom tailpipes; and a 5-inch model for larger tailpipe diameters primarily used with CMI Big Tube Racine Header Systems.

The 5-inch muffler can also be retro-fitted into 5 and 6-inch outside diameter tailpipes to accommodate larger horsepower applications. This option is also available to OEM boat builders who order mufflers installed during the tailpipe manufacturing process for an inconspicuous appearance on the transom.

496 DIVERTER / "Y" PIPE

CMI Diverter Y-Pipes conveniently allow the operator to switch from straight exhaust pipes to the original thru-prop exhaust system when quieter operation is required. CMI Y-pipes with coned ends make hose assembly easy on all 496 engine applications equipped with factory riser systems, transom tips, Mercruiser Bravo-style drives and a bullhorn. The Y-pipe design also allows users to add a free breathing exhaust tip to the assembly. CMI recommends installation of baffled tips for most applications.

 

CMI Internal Sound Choice System™

All CMI Sound Choice Tailpipes are water jacketed to minimize water reversion.

CMI External Sound Choice System

CMI External Sound Choice silencers allow the operator to muffle high decibel sound waves emitted through the exhaust with simply a flip of a switch. External Sound Choice stainless steel silencers feature a fully-polished, mirror-like finish and can be installed on most gas or diesel engine applications. Heavy duty shaft and butterfly valves are standard to meet requirements of high-horsepower propulsion systems. CMI Sound Choice System are pneumatically operated, eliminating the risk of electrical spark hazards.

Sound Choice Activation Pneumatic Pump and Accessories