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Clearly the industry’s most efficient replacement for LS1, LS2, and LS6 cylinder heads, World’s 15° WARHAWK casting deliver more power than other aftermarket heads in its category. A number of important features set the WARHAWK 15° apart from others, including having the same 15° valve centerline and rocker arm attachment angles to ensure correct valve train geometry when longer valves are employed. The highly efficient 235cc intake (2.080” Valve) and 87cc exhaust ports (1.600 Valve) provide outstanding flow. You have a choice of 64cc or 72cc combustion chambers. Want even more flow and power? World offers WARHAWK 15° heads that are CNC-ported with ports designed by noted horsepower merchants, Kuntz & Co. The intakes have been enlarged to 255cc runners while the exhaust side has also been enhanced. Larger 2.100 intake valves are employed. Available as bare castings or in race-ready assemblies that have a multi-angle intake valve job and radiused exhaust, are equipped with Manley stainless steel valves, high performance springs and Manley chrome moly retainers. Compatible with stock LS1 rocker arms and OEM stands.
Casting ID Number: WOR-075 Material: 355-T6 alloy high density aluminum Valve Seats: Intake (hardened), exhaust (hardened) Valve Guides: Manganese bronze Spring Seats: Machined for 1.560" Valves: Manley stainless steel valves in assemblies Valve Diameter: 2.080" intake, 1.600" exhaust (5/16" stem) as cast, 2.100" intake, 1.600" exhaust (5/16" stem) CNC ported Rocker Arms: Stock LS1 with stock stands Intake Runner: 235cc, standard port location Exhaust Ports: 87cc, standard location Combustion Chamber: 64cc or 72cc Spark Plug: 14mm .750" reach gasket style Valve Job: Multi-angle intake and radiused exhaust Valve Cover Rail: Raised .300" for aftermarket valvetrain Valve Angle: Stock 15° Accessory Bolt Holes: Stock
Spring Specs 1.437": 125 lbs. @ 1.810", 340 lbs. @ 1.210", coil bind @ 1.160", max lift @ .600" 1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift @ .700"
Head Flow @ .800 Lift 305 intake, 212 exhaust (Super Flow 1050) 328 intake, 229 exhaust, (Super Flow 600) CNC Ported @ .800 Lift 330 intake, 243 exhaust (Super Flow 1050) 352 intake, 261 exhaust (Super Flow 600) All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.
