AFR 280cc BBF Bullitt 14 Degree Cylinder Heads 3803

AFR 280cc BBF Bullitt 14 degree cylinder heads are your shot to outgun the competition! They feature partially CNC-ported intakes, exhausts, and chambers, A356 aluminum castings, and high-quality components throughout with standard exhaust port locations. This clean-sheet redesign of their Bullitt cylinder heads deliver a decreased overall runner size, a more consistent cross-sectional area, carefully shaped combustion chambers, and repositioned valves to complement the intake and exhaust port design. Together they improve engine response, providing increases in horsepower and torque. The 280cc Bullitt heads are recommended for street, towing, or street/strip engines with displacements up to 477 cu. in., operating up to 6,200 rpm. Load your engine for performance with AFR Bullitts!Brand: Airflow Research (AFR)
Manufacturer's Part Number: 3803
Part Type: Cylinder Heads
Product Line: AFR 280cc BBF Bullitt 14 Degree Cylinder Heads
HP Direct Part Number: AFR-3803
Combustion Chamber Volume (cc): 75
Intake Runner Volume (cc): 270cc
Exhaust Runner Volume (cc): 132cc
Cylinder Head Style: Assembled
Cylinder Head Material: Cast aluminum
Camshaft Style: Solid roller
Intake Valve Diameter (in.): 2.250 in.
CNC-Machined Combustion Chamber: Yes
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Intake Port Location: Standard
Exhaust Port Shape: Rectangular
Exhaust Port Location: Standard
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in.): 1.760 in.
Valve Springs Included: Yes
Maximum Valve Lift (in.): 0.680 in.
Outside Diameter of Outer Spring (in.): 1.550 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
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
Guideplate Pushrod Size: 3/8 in.
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 14
Exhaust Valve Angle: 8
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: Includes solid roller springs. Due to valve angle and location, custom pistons or notching of existing pistons are required.