JEGS 555-514320 Small Block Ford Cylinder Head Features:

• Combustion Chamber Volume: 66 cc
• Intake Runner Volume: 200 cc
• Exhaust Runner Volume: 72 cc
• Cylinder Head Style: Assembled
• Cylinder Head Material: Cast aluminum
• Camshaft Style: Hydraulic roller
• Intake Port Shape: Rectangular
• Intake Port Dimensions: 2.010 in. x 1.200 in.
• Intake Valve Diameter: 2.050 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: Square
• Exhaust Port Dimensions: 1.380 in. x 1.390 in.
• Exhaust Port Location: Standard
• Spark Plug Thread Size: M14 x 0.750
• Spark Plug Seat Style: Gasket
• Intake Valves Included: Yes
• Exhaust Valves Included: Yes
• Exhaust Valve Diameter: 1.600 in.
• Valve Springs Included: Yes
• Installed Height: 1.875 in.
• Seat Pressure at Installed Height: 210 lbs.
• Open Height: 1.300 in.
• Open Pressure: 510 lbs
• Valve Spring Coil Bind Height: 1.187 in.
• Maximum Valve Lift: 0.650 in.
• Outside Diameter of Outer Spring: 1.540 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
• Valve Stem Seal Style: Positive stop
• Rocker Arms Included: No
• Rocker Arm Nuts Included: No
• Guideplates Included: Yes
• Guideplate Pushrod Size: 5/16 in.
• Valve Cover Mounting Style: Perimeter bolt
• Accessory Bolt Holes Drilled: Yes
• Intake Valve Angle: 20
• Exhaust Valve Angle: 20
• 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
• Machined for O-Ring: No
• Remanufactured: No
• Notes: Deck thickness is 0.325 in.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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