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Supertrapp 1 3/4" Inlet TT500 XT500 Aluminum External Disc Muffler Supertrapp 1 3/4" Inlet Universal Aluminum External Disc Muffler Approximately 13 in. long tip-to-tip without discs or end cap
The big 4" power house exhaust - aluminum body Supertrapp muffler kit includes all items shown, including eight 4 in. diffuser discs, closed end cap, re-packable baffle core, Connection joint clamp, header gasket, "S" Pipe and our BIG 38mm header pipe!
Fewer discs increase low-end torque and richen the carbureted fuel mixture. More discs increase sound levels, increase top-end power and lean out the carbureted fuel mixture. NOTE: When tuning an exhaust system, start with fewer discs and add. Never start with a lot of discs and subtract. Generally on a stock set up (no engine modifications, and stock carb and air filter), you can start with six to eight discs. Adding more disc to a stock engine you will loose back pressure resulting in loss of power.