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AFR CNC Ported Aluminum Ford SB Race Head
With 220cc fully CNC ported intake runners. Exhaust ports and combustion chambers are also 100% CNC ported for the ultimate in flow capabilities. 3/4" thick decks makes them ideal for heavy nitrous or blower applications.
Assembled with stainless steel valves. 1.550" roller springs, 10 degree chrome moly retainers and machined locks, 3/8" rocker studs and 5/16" guide plates.
Part Type: Cylinder Head
Application: Ford Small Block (289-351W) Stud Mount
Cylinder Head Material: Aluminum
Bare or Assembled: Assembled
Combustion Chamber Size: 58cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 20
Exhaust Valve Angle: 20
Intake Port Volume: 220cc
CNC Machined Intake Port: Yes
Intake Port Flow: 331 cfm @ .750" lift/ 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 2.130" x 1.300"
Suggested Intake Gaskets: Fel-Pro 1262 or Equivalent
Exhaust Port Volume: 70cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 235 cfm @ .750" lift/ 28"
Exhaust Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Dimensions: 1.400" x 1.400"
Suggested Exhaust Gaskets: Fel-Pro 1487 or Equivalent
Suggested Spark Plug: 14mm x .750" reach
Valve Guides: Bronze
Valve Guide Spacing:
Valve Stem Diameter: 8mm
Valve Seats: Ductile Iron
Valve Job: 3-Angle
Intake Valve Diameter: 2.080"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.600"
Exhaust Valve Included: Yes
Suggested Valve Length: Intake: 5.000", Exhaust: 5.030"
Valve Spring Pockets: 1.580" (may machine up to 1.625" MAX)
Valve Springs Included: Yes, 1.550 Dual
Valve Spring Application: Mechanical Roller, 220lbs. Seat .710" max lift
Valve Springs Retainers Included: Yes
Valve Locks Included: Yes (10 degree)
Valve Seals Included: Yes
Rocker Studs Included: Yes (7/16")
Guide Plates Included: Yes
Valve Cover Mounting Style: Perimeter bolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts: 7/16": ARP 154-3701, 1/2" ARP 154-3603
Suggested Head Studs: 7/16": ARP 154-4001, 1/2": ARP 154-4005
Suggested Stud Girdle: Jomar 1126, Howards Cams 90201
Head Bolt Torque with Oil: 7/16": Upper Row 80 ft./lbs., Lower Row 70 ft./lbs., 1/2": Upper Row 110 ft./lbs., Lower Row 110 ft./lbs.
Rocker Stud Torque with Oil: 25-30 ft./lbs.
Intake Bolt Torque with Oil:
Manufacturer: Airflow Research
Manufacturer's Part Number: 1451
Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair
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