JEGS Small Block Chevy Vortec Cast Iron Cylinder Head | Made In USA | 1 Per Package | Straight Spark Plug | 1.94” Intake / 1.5” Exhaust Valve | 170cc Intake Ports | .475” Max Lift
- FITS ALL 1955-Present GM small blocks except LT1, LT4, and LS1-style engines.
- UTILIZES FAST BURN COMBUSTION CHAMBERS and high-velocity intake and exhaust ports.
- PERFORMS GREAT RIGHT OUT OF THE BOX and can be mildly ported and milled up to 0.040 inch.
- REQUIRES A VORTEC-STYLE INTAKE MANIFOLD to complete installation.
- SPECIFICATIONS: 1.94” intake / 1.5” exhaust valve, 170cc intake ports, .475” max lift, straight spark plug design, 3/8 “ rocker arm studs, 64cc combustion chambers, 1.25” valve springs.