World’s engineering team has developed what is the ultimate competition cylinder head for 302/351 Ford small block applications. It features a highly advantageous 10° valve angle (with parallel rocker arm mounting) and some humongous ports. The “as-cast” intake runners are available in 275 and 285cc with huge 102cc exhaust ports. Add the CNC porting option with ports designed by Kuntz & Co. and a 310cc intake runner is yours. Designed for use with all power-adders, the 10° MAN O'WAR comes with provisions to use two extra head bolts per cylinder as is offered with the companion MAN O'WAR block.

Casting ID Number: WOR-081
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
Guide Plates: Special World part #830463-8
Rocker Arm Studs: Adjustable roller rocker. NOTE: If Jesel Shaft system is to be used, a 5.700" valve may be required
Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes)
Intake Runner: 275cc or 285cc, standard port location
Exhaust Ports: 102cc, standard location (dual exhaust bolt pattern to accommodate large custom headers)
Combustion Chamber: 64cc
Spark Plug: 14mm .750" reach gasket style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised
Valve Angle: Stock 10°
Accessory Bolt Holes: Stock

Spring Specs
1.550": 200 lbs. @ 1.900", 480 lbs. @ 1.200", coil bind @ 1.150", max lift @ .700"

Head Flow
275cc @ .700 Lift
347 intake, 231 exhaust (Super Flow 1050)
373 intake, 251 exhaust (Super Flow 600)
285cc @ .800 Lift
N/A
CNC Ported 310cc @ .800 Lift
409 intake, 266 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.