S&S Cycle Piston Cooling Jet Kit - Twin Cam278737358 Product Description Milled from Billet Aluminum 6061 T6 Revised spray locations for more effective cooling Dual Spray technology evenly cools both intake and exhaust sides of pistons Creates a cooler engine with more power and better durability Shortened nozzle for increased rod clearance Includes all needed gaskets and hardware Equivalent oil flow to stock