The highly acclaimed "Q" series silencers shook the motorcycling world on its debut in 2002. Serious sound deadening qualities and excellent power. With its longer oval canister, the trademarked Q uses internal technology that retains optimum flow characteristics while enhancing sound absorption qualities. The U.S. Forest legal spark arrestor will meet the mandated 96dB sound level set by the US Forest Service making it the quietest performance spark arrestor made! Serious sound deadening qualities and excellent power. Detailed Specifications: Type: Silencer. Spark arrestor: Internal. Carb warning: No. Weight: 3.0 pounds.