If you are having a difficult time finding a heat muff to fit your engine/exhaust combination, chances are we have already come up with a layout that will fit. If not, send us a drawing and we can make what you need for your particular installation. All of our heat muffs are 2 ¾” outside diameter, made of 6061-T6 aluminum and can be made in any length from 4” to 10”. Our internal stainless steel end plate assemblies will fit either 1½", 1 ¾” or 2” exhaust pipe with the option of being centered or off centered for additional clearance. Inlet and outlet connections can be provided for either 1 ½” or 2” scat tube.