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Airflow Research CNC Ported Aluminum Chev SB Street Head
Emissions legal heads featuring CNC ported intake runners, 100% CNC ported 64cc exhaust runners. 100% CNC ported combustion chambers and 3/4" thick decks (great for supercharger and nitrous applications).
Fully assembled with 2.020"/1.600" stainless steel valves, .600" lift (flat tappet/hydraulic roller) springs, 7 deg. locks, bronze guides, studs and guide plates.
Part Type: Cylinder Head
Application: Chevrolet Small Block
Cylinder Head Material: A356 Aluminum
Bare or Assembled: Assembled
Combustion Chamber Size: 75cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 23
Exhaust Valve Angle: 23
Intake Port Volume: 180cc
CNC Machined Intake Port: Yes
Intake Port Flow: 260 cfm @ .500" Lift/ 28
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 2.050" x 1.250"
Suggested Intake Gaskets: Fel-Pro #1256 or Equivalent
Exhaust Port Volume: 64cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 207 cfm @ .500" Lift/ 28
Exhaust Port Location: .100” Raised
Exhaust Port Shape: Square
Exhaust Port Dimensions: 1.450" x 1.550"
Suggested Exhaust Gaskets: Fel-Pro #1404 or Equivalent
Spark Plug Style: (L98) Angled
Suggested Spark Plug: 14mm x .750"
Valve Guides: Yes (Bronze)
Valve Guide Spacing:
Valve Stem Diameter: 11/32" (.3415")
Valve Seats: Yes (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: 1.750" O.D. (Do not machine spring pad any deeper!)
Valve Springs Included: Yes, 1.290" Dual
Valve Spring Application: Mechanical Flat Tappet/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 (3/8")
Guide Plates Included: Yes
Valve Cover Mounting Style: Perimeter
Steam Holes Drilled: No
Heat Crossover: Yes
Suggested Head Bolts: ARP #134-3701
Suggested Head Studs: ARP #234-4301
Suggested Stud Girdle: Power Products 43100K, Howards Cams 90100, Jomar 1104
Head Bolt Torque with Oil: 65 ft./lbs.
Rocker Stud Torque with Oil: 55 ft./lbs.
Intake Bolt Torque with Oil: 25 ft./lbs.
Manufacturer: Airflow Research
Manufacturer's Part Number: 0917
Weight: 67.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair
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