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Cast Iron Gen V and Gen VI Cylinder Head Assembly

Brand: Chevrolet Performance

Part Number: 12562920

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$662.85

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 Part number 12562920 has an additional freight charge of $24.95 per item due to its large size and/or weight.






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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.


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