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Airflow Research CNC Ported Aluminum Ford SB (289-351W) Street Head
For the ultimate Ford small block. These emissions legal heads have fully CNC ported intake runners, exhaust and combustion chambers. They feature 185cc intake runners, bronze guides and hardened valve seats.
Assembled with stainless steel valves, 1.290" springs (hydraulic), 10 degree chrome moly retainers and locks, 3/8" rocker studs and 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: 185cc
CNC Machined Intake Port: Yes
Intake Port Flow: 297 cfm @ .600" lift/ 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 2.045" x 1.205"
Suggested Intake Gaskets: Fel-Pro 1262 or Equivalent
Exhaust Port Volume: 70cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 215 cfm @ .600" lift/ 28"
Exhaust Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Dimensions: 1.355" x 1.360"
Suggested Exhaust Gaskets: Fel-Pro 1415 or Equivalent
Suggested Spark Plug: 14mm x .750" w/ Gasket Seat
Valve Guides: Yes
Valve Guide Spacing:
Valve Stem Diameter: 8mm
Valve Seats: Ductile Iron
Valve Job: 5-Angle
Intake Valve Diameter: 2.020"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.600"
Exhaust Valve Included: Yes
Suggested Valve Length: Intake: 4.900", Exhaust: 4.950"
Valve Spring Pockets: 1.460 (can be cut to 1.625 MAX)
Valve Springs Included: Yes, 1.290" Dual
Valve Spring Application: Hydraulic Roller, 140lbs. Seat, .600" max lift
Valve Springs Retainers Included: Yes
Valve Locks Included: Yes (7 degree)
Valve Seals Included: Yes
Rocker Studs Included: Yes
Guide Plates Included: Yes
Valve Cover Mounting Style: Perimeter bolt
Steam Holes Drilled: No
Heat Crossover: Yes
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
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: 1422
Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair
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