Chevrolet Performance Bowtie Aluminum Cylinder Head Assembly

These cylinder heads offer a low- to mid-range of torque with improved throttle response for use on drag strip applications or street applications. Their thick decks are designed for high-performance vehicles using an aluminum construction. They also feature high-velocity airflow passages.

Features and Benefits:
- Designed for Mark IV and Gen V or VI Blocks
- Made from 356-T6 aluminum with 9/16" thick decks
- As-cast intake and exhaust ports with no heat risers
- 1.55" valve spring seat diameter
- Heli-coiled 7/16" screw-in rocker stud holes
- Designed for use with 3/8" pushrods
- Choice of port shape and intake valve
- Features small Chevy bowties

Oval Port Features and Benefits:
- Completely assembled with 2.190"/1.880" or 2.250"/1.880" 11/32" stem valves
- 290cc oval intake ports
- 110cc exhaust ports
- 110cc combustion chambers

Rectangle Port Features and Benefits:
- Completely assembled with 2.250"/1.880" 11/32" stem valves
- 300cc rectangular intake port
- 110cc exhaust port
- 118cc combustion chamber

Vehicle Fitment:
- 1964-1972 Chevy Chevelle/El Camino
- 1971-1972 GMC Sprint
- 1964-1969 Pontiac Beaumont
- 1967-1981 Chevy Camaro
- 1968-1974 Chevy Nova
- 1970-1972 Chevy Monte Carlo

*ONLY for use on pre-pollution controlled vehicles; designed for pre-1976 street vehicles or any off-road vehicle.