This billet head kit will bolt right on your Rev 600 and offer great performance gains. This head kit provides increased cooling capacity for better cooling, quicker throttle response, and a 4-5 hp gain. Low, mid, and high elevation domes are available. Kit comes standard with 2 domes, billet head cover, and complete instructions. A very noticeable increase in acceleration and throttle response without sacrificing reliability with premium pump fuel. Easy bolt on power that works!!