FMF 2.1 Spark Silencer

The FMF TurbineCore 2.1 spark arrestor silencer (also called a spark arrested muffler or slip-on silencer) is a 2-stroke exhaust silencer for off-road riding. It is built around FMF's exclusive Turbine Dampening System. This system keeps noise low and keeps exhaust flowing freely through the canister. It also gives the silencer U.S. Forest Service spark arrestor approval.

Key Features:

• Exclusive FMF Turbine Dampening System built into the core. It is non-removable.
• U.S. Forest Service legal spark arrestor that does not restrict power
• Straight-through canister design with a performance-flow stainless steel end cap
• Stainless steel end cap and stinger for durability
• Aluminum canister body, lighter than stock
• Larger-diameter canister than earlier designs. It gives more tunability and longer packing life.
• Shape inspired by FMF's 4.1 system, with a crisp sound and a smooth, race-tested power curve
• Made in the USA

The Turbine Dampening System is less prone to clogging with residual oil than screen-type arrestors. This keeps maintenance low. Repacking is needed less often because of the larger canister. The TurbineCore 2.1 is intended for closed-course competition use and is not intended for street use.