Brand: Speedmaster Part Number: PCE281.1773 Part Type: Cylinder Heads Cylinder Head Style: Bare Cylinder Head Material: Cast Iron Cylinder Head Finish: Natural Combustion Chamber Volume (cc): 62 cc CNC-Machined Combustion Chamber: No Intake Runner Volume (cc): 179 cc Exhaust Runner Volume (cc): n/a CNC-Machined Intake Runner: No CNC-Machined Exhaust Runner: No Intake Port Shape: Standard Magnum Intake Port Location: Standard Exhaust Port Shape: Standard Magnum Exhaust Port Location: Standard Spark Plug Style: Standard Comp. Valve Job: No Intake Valves Included: No Intake Valve Diameter (in): 1.920 in. Exhaust Valves Included: No Exhaust Valve Diameter (in): 1.625 in. Valve Springs Included: No Damper Spring Included: No Retainers Included: No Locks Included: No Valve Stem Seals Included: No Rocker Arm Studs Included: No Rocker Arms Included: No Rocker Arm Nuts Included: No Guideplates Included: No Valve Cover Mounting Style: Perimeter Bolt Accessory Bolt Holes Drilled: Yes Intake Valve Angle: Standard Exhaust Valve Angle: Standard Valve Guides Included: Yes Valve Guide Material: Cast iron Valve Seats Machined: Yes Valve Seat Machine Style: 3-angle Valve Seat Material: Ductile iron Steam Holes Drilled: No Oiling Style: Through pushrod Machined for O-Ring: No Heat Crossover: No Quantity: Sold individually. Calculator Compression Calculator