Cast Iron Gen V and Gen VI Cylinder Head Assembly

Cast Iron Gen V/Gen VI Cylinder Head Assembly

Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990 and later GM Big Block 454-cubic-inch and 502-cubic-inch engines. These brand-new cylinder heads meet GM’s stringent quality standards and provide excellent service and durability not found in used cylinder heads.

Service Replacement Head Technical Notes:

• Cast-iron
• Rectangular intake ports
• Machined for 2.180″/1.880″ (3/8″ stems) valves
• Non-adjustable rocker arm design
• Heads have heat risers
• Will not work on production Mark IV cylinder blocks

12562920 Chevrolet Cylinder Head

• Cast iron head
• Completely assembled with 2.180“/1.880” valves
• 118cc combustion chambers
• Uses P/N 12562925 bare casting

This head is assembled with the following components:

• 14097045 Intake Valves
• 14097049 Exhaust Valves
• 14097002 Valve Springs
• 12550421 Valve Spring Retainer
• 3875916 Valve Spring Shims3947880 Valve Locks

Additional Required Components:

• (2) 14097001 OR (2) 12555728 gaskets
• (24) 10141204 bolts
• (8) 10141205 bolts
• 19157985 spark plug

Engine Application: 24502620, 12568778, 24502618, 12568774

Note: Will not work on L29 engines. Rectangular intake ports are larger in volume and designed to enhance high rpm horsepower. They are an ideal street head for those big-block enthusiasts who what more power from a street car that sees a lot of drag strip action.