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Airflow Research CNC Ported Magnum Series Aluminum Chev BB Head
Are you looking for big torque and big horsepower? AFR's Fully CNC ported heads are available with an intake runner size from a super high torque 315cc to the all out 357cc. CNC ported heads for almost every Chev big block application. They all feature AFR's trademark .750" thick decks and reinforced rocker stud bosses.
Part Type: Cylinder Head
Application: Chevrolet Big Block
Cylinder Head Material: Aluminum
Bare or Assembled: Bare
Combustion Chamber Size: 121cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 24
Exhaust Valve Angle: 24
Intake Port Volume: 357cc
CNC Machined Intake Port: Yes
Intake Port Flow: 425 cfm @ .800" Lift/ 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 2.520" x 1.815"
Suggested Intake Gaskets: Fel-Pro 1275 or Equivalent
Exhaust Port Volume: 135cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 327 cfm @ .800" Lift/ 28"
Exhaust Port Location: Raised .375"
Exhaust Port Shape: D-Shaped
Exhaust Port Dimensions: 1.780" x 2.025"
Suggested Exhaust Gaskets: Fel-Pro 1412 or Equivalent
Suggested Spark Plug: 14mm x .750" reach
Valve Guides: Yes
Valve Stem Diameter: 11/32" (.3415")
Valve Seats: Yes (Ductile Iron)
Valve Job: 5-Angle
Intake Valve Diameter: 2.300"
Intake Valve Included: No
Exhaust Valve Diameter: 1.880"
Exhaust Valve Included: No
Valve Spring Pockets: 1.725" O.D. (1.750" MAX.)
Valve Springs Included: No
Valve Spring Application: NA
Valve Springs Retainers Included: No
Valve Locks Included: No
Valve Seals Included: No
Rocker Studs Included: No
Guide Plates Included: No
Valve Cover Mounting Style: Perimeter bolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts: ARP 135-3703 (Mark IV) ARP 135-3707 (Mark V)
Suggested Head Studs: ARP 235-4713
Head Bolt Torque with Oil: 75 ft./lbs.
Rocker Stud Torque with Oil: 55-60 ft./lbs.
Manufacturer: Airflow Research
Manufacturer's Part Number: 3570
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair
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