Cylinder Kt Klx/Drz/Kfx/Ltz400 P400510100002Cylinder Kit Big Bore Race for 4 StrokeKit includes aluminum cylinder with nickel carbide coating designed with larger water jackets Specially designed, high performance, hard anodized power valves (cannot use OEM) Forged piston with molybdenum coating Does not include cylinder head. Gets much more torque than OE bikes. In order to strongly increase horsepower to the wheel, it is necessary to use, at least, a racing exhaust system.