Slip-On exhaust systems replace your existing s-bend pipe and exhaust canister. Two Brothers' s-bends are manufactured from .035 thin wall stainless steel. They then polish them to a satin finish. Two Brothers' uses only #304 stainless which will never rust. After a few heat cycles the steel turns a golden amber color which is the characteristic signature of high quality stainless steel. These systems not only add horsepower but also can drop significant weight from your bike. This type of canister can be mounted in the original canister position or in a high mounted canister position depending on the bike. The entire line of TBR M Series canisters feature the same high level of quality construction and are designed to be fully serviceable in the event of damage, routine maintenance or the occasional repack. Two Brothers Racing's V.A.L.E. slip-on exhaust systems and flange-on systems feature CNC'ed aluminum inlets. These special designs provide for ease of maintenance as well as simplified construction, which is what a premium performance product is all about! The exhaust note produced by all of their Top Level exhaust systems is best described as being deep and throaty without suffering from the shrill whine normally associated with other manufacturer's straight through muffler canisters. V.A.L.E. V ariable A xis L ocking E xhaust. The V.A.L.E. system is TBR's revolutionary and patented method of attaching their muffler canisters to the exhaust tube without the use of springs or welding. Their V.A.L.E. systems allow the muffler assembly - exhaust tube and canister - to be positioned perfectly on the bike before all the mounting hardware is fully tightened. Once the canister and exhaust tubes are properly aligned, the V.A.L.E. assembly locks the muffler canister to the exhaust tube assuring a perfect, leak-free fit. NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states.