This system completely replaces your existing exhaust systemNot only adds horsepower but also can drop significant weight from your bikeHeader systems are built as a complete unitFinished systems flow better at the collectors, makes more power and does not vibrate on the bikeM series exhaust canisters feature the highest level of quality construction and are designed to be fully serviceable in the event of damage, routine maintenance or the occasional repackV.A.L.E. slip-on/full exhaust systems and flange-on systems feature CNC machined aluminum inlets and outlets. These special designs provide for ease of maintenance as well as simplified construction, which is what a premium performance product is all aboutThe exhaust note produced by all Top Level exhaust systems is best described as being deep and throaty without suffering from the shrill whine normally associated with other manufacturers straight through muffler canistersAll of the canisters perform and sound the same, they are simply different sizes. They all incorporate exclusive technologies and premium materialsThe shape and orientation is determined by TBR R&D department, based on a performance criteria check listPick the sleeve material that best fits your tasteFOR CLOSED COURSE RACING ONLY