New and improved head features larger, 218cc intake runners, 2.150" intake valves, improved water jackets, and clearance for an OEM-type mechanical fuel pump. Exhaust ports are raised, but will accept stock manifolds or headers. Valve train has been upgraded with 7/16" screw-in studs and 3/8" dia. pushrod guide plates. Intended for big block Oldsmobiles with a minimum 4.125" bore. Sold individually.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- No
- Combustion Chamber Volume (cc):
- 77cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- No
- Intake Runner Volume (cc):
- 218cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- 6 degree
- CNC-Machined Exhaust Runner:
- No
- Exhaust Runner Volume (cc):
- 128cc
- Exhaust Port Shape:
- Square
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 6 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.150 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.680 in.
- Valve Type:
- Stainless
- Maximum Valve Lift (in.):
- 0.600 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Dual W/Damper
- Outside Diameter of Outer Spring (in.):
- 1.460 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Manganese bronze
- Valve Seats Machined:
- No
- 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:
- Positive stop
- Locks Included:
- Yes
- Lock Style:
- 7 degree
- Camshaft Style:
- Hydraulic roller
- Spark Plug Style:
- N/A
- 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 pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Notes:
- For use with hydraulic roller camshafts. Recommended for applications with a minimum of 4.125 in. bore spacing
- Make:
- Oldsmobile
- Engine Family:
- Oldsmobile V8
- Engine Sizes:
- 6.6L/400-7.5L/455
- Years:
- 1965-1976
