Head fits 1965-79 389-455 Pontiac engines and is similar to the 1969-70 Ram Air IV cylinder head. EDE60579 is for cars with low compression using 92 octane fuel. EDE60599 provides higher compression for racing. Both produce outstanding horsepower with excellent low-speed torque and throttle response. Assembled head includes stainless steel 2.11" intake and 1.66" exhaust valves, heavy-duty valve springs, steel retainers, keepers, valve seals, rocker studs and guide plates. Both 87cc and 72cc heads are fitted with hardened valve seats and bronze valve guides, and use Ram Air IV exhaust port flanges. Sold individually, bare or assembled.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- No
- Combustion Chamber Volume (cc):
- 72cc
- Combustion Chamber Style:
- N/A
- CNC-Machined Intake Runner:
- No
- Intake Runner Volume (cc):
- 215cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 14 degree
- CNC-Machined Exhaust Runner:
- No
- Exhaust Runner Volume (cc):
- 175cc
- Exhaust Port Shape:
- D-port
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 14 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.110 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.660 in.
- Valve Type:
- Stainless
- Maximum Valve Lift (in.):
- 0.575 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Single w/Damper
- Outside Diameter of Outer Spring (in.):
- 1.460 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Manganese bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Ductile iron
- Valve Seat Machine Style:
- 3-angle
- Retainers Included:
- Yes
- Retainer Material:
- Steel
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- PTFE Positive stop
- Locks Included:
- Yes
- Lock Style:
- 7 degree
- Camshaft Style:
- Hydraulic flat tappet
- Spark Plug Style:
- Angled
- Guideplates Included:
- Yes
- Guideplate Pushrod Size:
- 5/16 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:
- Yes
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Notes:
- These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit 8549.
- Make:
- Pontiac
- Engine Family:
- Pontiac V8
- Engine Sizes:
- 6.4L/389-7.5L/455
- Years:
- 1959-1979
