Brand: Airflow Research (AFR)
Manufacturer's Part Number: 3450-1
Part Type: Cylinder Heads
Product Line: AFR 345cc Magnum BBC Cylinder Heads
Automotive Fittings Part Number: AFR-3450-1
Combustion Chamber Volume (cc): 121
Intake Runner Volume (cc): 345cc
Exhaust Runner Volume (cc): 124cc
Cylinder Head Style: Bare
Cylinder Head Material: Cast aluminum
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 2.300 in.
CNC-Machined Combustion Chamber: Yes
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Combustion Chamber Style: Heart
Intake Port Location: Standard
Exhaust Port Shape: Round
Exhaust Port Location: Standard
Intake Valves Included: No
Exhaust Valves Included: No
Exhaust Valve Diameter (in.): 1.880 in.
Valve Springs Included: No
Maximum Valve Lift (in.): 0.750 in.
Outside Diameter of Outer Spring (in.): 1.625 in.
Damper Spring Included: No
Number of Springs Per Valve: Dual
Retainers Included: No
Retainer Material: Chromoly steel
Locks Included: No
Lock Style: 10 degree
Valve Stem Seals Included: No
Rocker Arm Studs Included: No
Rocker Arm Nut Thread Size: 7/16 in.-20
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: No
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: No
Intake Valve Angle: 24/4
Exhaust Valve Angle: 15/4
Valve Guides Included: No
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 5-angle
Valve Seat Material: Ductile iron
Cylinder Head Color: Natural
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: Yes
Remanufactured: No
Quantity: Sold as a pair.
Notes: Cast heads without parts, with CNC chambers and CNC bowl blend
Description:
If huge horsepower is what you're searching for, then AFR 345cc Magnum BBC cylinder heads will certainly deliver. They're recommended for radical street/strip, Pro Street, or racing applications on engines up to 572 cu. in. operating below 7,000 rpm—and are capable of flowing 400 cfm at 0.700 in. of lift. These A356 aluminum heads are designed for maximum horsepower and rpm capability, with an average primary operating range of 3,500-8,000 rpm; they also provide impressive torque figures. AFR recommends the use of .120 in. wall pushrods and full-roller rocker arms for strength.

It's vital that you check clearance of all moving parts due to the vast array of rocker arms, lifters, cams, springs, etc. Don't forget to check pushrod-to-head clearance, as well as any potential interference from your rocker arms and spring assemblies prior to final engine assembly. AFR 345cc Magnum BBC cylinder heads come standard with AFR's trademark 3/4 in. thick cylinder head deck, reinforced rocker stud bosses, and premium one-piece stainless steel 2.300 in. intake and 1.880 in. exhaust valves.