This system replaces your existing s-bend pipe and canister The S-Bends are manufactured from .35" thin wall stainless steel, polished to a mirror finish Made with #304 stainless steel which will never rust These systems not only add horsepower but also can drop significant weight from your bike M-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 repack V.A.L.E slip-on exhaust systems feature CNC machined aluminum inlets and outlets, providing ease of maintenance as well as simplified construction, which is what a premium performance product is all about!