FMFâ€™s Turbine Core 2.1 Silencer is one of the most up to date slip-ons you can get for your 2 stroke exhaust, and itâ€™s complete with convenient spark-arrested performance that proves FMF loves to support 2 strokes and their riders. Built with an aluminum canister and a stainless mid-pipe and end cap, the 2.1 delivers a smooth power curve throughout the rpms while still coming in at a lighter weight than your stock setup. Thatâ€™s even considering the larger diameter canister that allows for more packing material and longer service intervals. But, the 2.1â€™s main claim to fame is its integrated USFA approved "Turbine Dampening System" spark arrestor. This system prevents all sparks from exiting the exhaust, but it doesnâ€™t choke the flow of exhaust gases like a screen-type arrestor can. Itâ€™s also essentially impossible for the Turbine Core to become clogged by residual oil or "spooge" as is common with screen arrestors.