This is a used billet head for all Ski Doo 800 H.O. motors. It will fit all 03-06 Ski Doo 800 H.O. motors. It is designed for operation at an elevation of 6000 ft. and above. The cylinder head is in excellent condition. It is only $175 plus shipping. If you have any questions please call us at 801-785-2244 or email us at powerhouseutah@yahoo.com.