The Vortec head significantly outflows the non-Vortec replacement head and offers a 20-40 horsepower increase over earlier cast iron heads. They will fit 1955 and after small-blocks except for the LT1/LT4 engines. (These heads require Vortec-specific intake manifolds). Sold each.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast iron
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- No
- Combustion Chamber Volume (cc):
- 64cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- No
- Intake Runner Volume (cc):
- 170cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Standard
- Intake Valve Angle:
- N/A
- CNC-Machined Exhaust Runner:
- No
- Exhaust Runner Volume (cc):
- N/A
- Exhaust Port Shape:
- Square
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- N/A
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 1.940 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.500 in.
- Valve Type:
- N/A
- Maximum Valve Lift (in.):
- 0.475 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Single w/Damper
- Outside Diameter of Outer Spring (in.):
- 1.250 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Manganese bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- N/A
- Valve Seat Machine Style:
- N/A
- 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 flat tappet
- Spark Plug Style:
- Straight
- Guideplates Included:
- No
- Guideplate Pushrod Size:
- N/A
- Rocker Arm Studs Included:
- Yes
- Rocker Arm Nut Thread Size:
- 3/8-24 in.
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Centerbolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen I
- Engine Sizes:
- 4.3L/262-6.6L/400
- Years:
- 1955-2002
