The AFR Bullitt line of cylinder heads for the Big Block Ford features a different port shape with a more consistent cross-section area and new valve positioning compared to the factory pieces. This new clean-sheet design improves engine response and increases horsepower and torque. Made of A356 aluminum castings, they feature 100% CNC-ported intake and exhaust chambers and high-quality components throughout. Recommended for more aggressive street/strip or race builds with displacements up to 512 CID operating up to 6500 RPM. Note: Due to AFR's valve angle and location, custom pistons or notching existing pistons will be required. Sold in pairs.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- Yes
- Combustion Chamber Volume (cc):
- 75cc
- Combustion Chamber Style:
- Open chamber
- CNC-Machined Intake Runner:
- Yes
- Intake Runner Volume (cc):
- 295cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 14 degree
- CNC-Machined Exhaust Runner:
- Yes
- Exhaust Runner Volume (cc):
- 142cc
- Exhaust Port Shape:
- Round
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 8 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.250 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.760 in.
- Valve Type:
- Stainless
- Maximum Valve Lift (in.):
- 0.850 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Single w/Damper
- Outside Diameter of Outer Spring (in.):
- 1.625 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Manganese bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Ductile iron
- Valve Seat Machine Style:
- 5-angle intake/3-angle exhaust
- Retainers Included:
- Yes
- Retainer Material:
- Chromoly
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- Viton Positive stop
- Locks Included:
- Yes
- Lock Style:
- 10 degree chromoly
- Camshaft Style:
- Solid roller
- Spark Plug Style:
- Angled
- Guideplates Included:
- Yes
- Guideplate Pushrod Size:
- 3/8 in.
- Rocker Arm Studs Included:
- Yes
- Rocker Arm Nut Thread Size:
- 7/16-20 in.
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Perimeter bolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through head
- Machined for O-Ring:
- No
- Quantity:
- Sold as a pair.
- Make:
- Ford
- Engine Family:
- Ford big block 385 Series
- Engine Sizes:
- 7.0L/429-7.5L/460
- Years:
- 1968-1987
