Fits Honda CRF250X .......improving the power considerably. DEFINITE INCREASED TORQUE AND HORSEPOWER. EASY INSTALLATION. COMPLETE KIT INCLUDED. Hi Grade Light weight Alloy . Stronger - lighter - Increased Power - Easy Installation & Maintenance. The end cap is designed for riders who want to take full advantage of extreme performance improvement. All parts are precision machined and manufactured for perfect fit. The aggressive look really finishes of the bike. The distintive low bark when fired up assures it will have heads turning