Brand: Airflow Research (AFR)
Manufacturer's Part Number: 2000
Part Type: Cylinder Heads
Product Line: AFR 315cc Magnum BBC Cylinder Heads
Automotive Fittings Part Number: AFR-2000
Combustion Chamber Volume (cc): 121
Intake Runner Volume (cc): 315cc
Exhaust Runner Volume (cc): 135cc
Cylinder Head Style: Assembled
Cylinder Head Material: Cast aluminum
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 2.250 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: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in.): 1.880 in.
Valve Springs Included: Yes
Maximum Valve Lift (in.): 0.850 in.
Camshaft Style: Solid roller
Outside Diameter of Outer Spring (in.): 1.625 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromoly steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Rocker Arm Studs Included: Yes
Rocker Arm Nut Thread Size: 7/16 in.-20
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 24/4
Exhaust Valve Angle: 15/4
Valve Guides Included: Yes
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: No
Remanufactured: No
Quantity: Sold as a pair.
Notes: 1 in. longer head bolts required on the four bottom exhaust bolt holes. These cylinder heads are competition ported.
Description:
Don't let their small size fool you—AFR Magnum fully CNC-ported 315cc aluminum cylinder heads will provide you with flow numbers that most medium sized heads, and some larger, can only dream about. This line was designed to optimize low and mid-lift airflow, while still generating impressive peak figures. Their application should be focused on smaller cu. in. Chevy big blocks (396-502) with a primary operating range of 2,500-6,800 rpm (this range is an average and will vary with engine displacement as well as component selection). AFR 315cc Magnum BBC heads should also be given strong consideration in larger street-driven or marine applications up to 555 c.i.d., where low-rpm power and drivability are factors. Extremely versatile with their incredibly strong low and mid-lift airflow figures, as well as peak numbers approaching the 400 cfm mark, the 315cc heads would be a great choice if you're looking for big torque and strong low-rpm performance and still have good rpm capabilities. They come standard with AFR's trademark 3/4 in. thick head deck, reinforced rocker stud bosses, and premium one-piece stainless steel 2.250 in. intake valves and 1.880 in. exhaust valves. Standard combustion chamber volume with AFR's fully CNC-ported 315cc version comes with a 121cc chamber. These AFR heads are available with an optional 114cc combustion chamber as well.