Airflow Research Magnum Series Aluminum Chev BB Head
New highly efficient port designs, an exclusive new combustion chamber provides impressive swirl figures and generates big low and mid-lift airflow figures. 3/4" thick decks, reinforced rocker bosses, and thick wall runners provide unparalleled durability.
Part Type: Cylinder Head
Application: Chevrolet Big Block
Cylinder Head Material: Aluminum
Bare or Assembled: Bare
Combustion Chamber Size: 119cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 24
Exhaust Valve Angle: 24
Intake Port Volume: 325cc
CNC Machined Intake Port: No
Intake Port Flow: 385 cfm @ .700" Lift/ 28"
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions: 2.360" x 1.685"
Suggested Intake Gaskets: Fel-Pro 1275 or Equivalent
Exhaust Port Volume: 132cc
CNC Machined Exhaust Port: No
Exhaust Port Flow: 280 cfm @ .700" Lift/ 28"
Exhaust Port Location: Raised .375"
Exhaust Port Shape: D-Shaped
Exhaust Port Dimensions: 1.720" x 1.920"
Suggested Exhaust Gaskets: Fel-Pro 1412 or Equivalent
Spark Plug Style:
Suggested Spark Plug: 14mm x .750" reach
Valve Guides: Yes
Valve Guide Spacing:
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
Suggested Valve Length:
Valve Spring Pockets: 1.750" O.D.
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
Suggested Stud Girdle:
Head Bolt Torque with Oil: 75 ft./lbs.
Rocker Stud Torque with Oil: 55-60 ft./lbs.
Intake Bolt Torque with Oil:
Manufacturer: Airflow Research
Manufacturer's Part Number: 3250
Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Pair |