Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):77
CNC-Machined Combustion Chamber:No
Intake Runner Volume (cc):188cc
Exhaust Runner Volume (cc):106cc
CNC-Machined Intake Runner:No
CNC-Machined Exhaust Runner:No
Combustion Chamber Style:Heart
Intake Port Location:Standard
Exhaust Port Shape:Square
Exhaust Port Location:Standard
Intake Valves Included:Yes
Intake Valve Diameter (in):2.072 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.680 in.
Valve Springs Included:Yes
Maximum Valve Lift (in):0.575 in.
Outside Diameter of Outer Spring (in):1.460 in.
Damper Spring Included:Yes
Number of Springs Per Valve:Single
Lock Style:7 degree
Valve Stem Seals Included:Yes
Valve Stem Seal Style:Positive stop
Rocker Arm Studs Included:Yes
Rocker Arm Nut Thread Size:7/16-20 in.
Rocker Arms Included:No
Rocker Arm Nuts Included:No
Guideplate Pushrod Size:3/8 in.
Valve Cover Mounting Style:Perimeter bolt
Accessory Bolt Holes Drilled:Yes
Intake Valve Angle:18
Valve Guides Included:Yes
Valve Guide Material:Manganese bronze
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
Notes:Heads are designed for use with a hydraulic flat tappet camshaft. Head bolt holes drilled for stock 7/16 in. bolts, but can be easily modified for 1/2 in. bolts or studs by drilling the 1/2 in. counterbore. Aftermarket 7/16 in. stud rocker arms and 3/8 in. hardened pushrods required. Heads used in S/B applications require the use of EDL-7111 Performer RPM manifold exclusively, and port matching will be required for installation.