Designed to provide serious horsepower for street/strip applications, the 18° MAN O'WAR has excellent flow characteristics in its “as cast” form. You have a choice of 200 or 225cc intake runners to provide the optimum balance of flow and velocity. Add our CNC porting option for even more flow and added combustion efficiency. With valves and rocker arm attachment parallel at 18°, they’re compatible with OEM valve trains. A powerful bolt-on for Mustangs!

Casting ID Number: WOR-080
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 #830462-8
Rocker Arm Studs: Screw-in style
Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes)
Intake runner : 200cc or 225cc, standard port location
Exhaust Ports: 65cc or 66cc, 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 18°
Accessory Bolt Holes: Stock

Spring Specs
1.250": 100 lbs. @ 1.810", 300 lbs. @ 1.250", coil bind @ 1.200", max lift @ .570"
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
200cc @ .800 Lift
291 intake, 190 exhaust (Super Flow 1050)
314 intake, 208 exhaust (Super Flow 600)
225cc @ .800 Lift
300 intake, 193 exhaust (Super Flow 1050)
321 intake, 208 exhaust (Super Flow 600)
CNC Ported 228cc @ .800 Lift
306 intake, 217 exhaust (Super Flow 1050)
326 intake, 236 exhaust (Super Flow 600)
CNC Ported 242cc @ .800 Lift
316 intake, 196 exhaust (Super Flow 1050)
336 intake, 214 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.