Expansion Chamber Seal kit for 2-Stroke 125 150 200 cc Euro Dirtbikes KTM SX, GasGas MC, & Husqvarna TC TE Motorcycles. Kit replaces old factory parts with fresh springs, o-ring seals, and pipe to silencer coupler. Kit configured to re-seal stock or aftermarket pipe with proper new swivel hook pipe springs, "O" Rings, and Hi-temp silencer to pipe coupler. 546050507000 Replaces factory equipment with exact fit quality parts. Kit comes complete with what you see. Designed to fit KTM 125 150 200 &';00+, Husqvarna TC TE 125 &';14+, & TE150 &';14+, and GASGAS MC125 &';21+ Complete set, nothing else needed to seal up your two stroke exhaust pipe.