Check the listing for details. 17cc OUTLAW HEMI 212cc PREDATOR HEAD 29mm - 25mm gokart racing - mini bike drags. Condition: New other (see details). Listed at 258.97 USD. new take off 17cc hemi 212cc predator outlaw head with 29mm intake and 25mm exhaust valves. new take off meaning takin off a new engine that has only been through testing at the factory. Due to the differences in cam base circles, deck heights, head milling, gasket thickness, rocker arms, etc., actual pushrod length can vary. I CAN DRILL TO FIT THE NON-HEMI PREDATOR BLOCK AT NO EXTRA CHARGE - message me if you need it drilled29mm intake valves 25mm exhaust valve cut .050" for a 17cc polished combustion chamber (approximate)red aluminum retainers with keepersported and polished (see pictures)lapped-in valves on a 3 angle valve job26 springsmodified guidesnew take off rocker arm assemblynew take off valve covervalve cover bolts new take off 5.550" stock length push rodsnew head gasketnew valve cover gasketnew intake gasketnew exhaust gasketspark plug and wrench BLACK KNIGHT SI's unique "Black Knight" valves (code: BK) come with a special coating that serves two purposes; to improve heat transfer for increased valve train life, and to combat the problems associated with lower quality unleaded gasoline. Carbon build-up with these valves is almost non-existent.