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Chevrolet Performance 12562926 - Chevrolet Performance Big Block Chevy Service Replacement Cylinder Heads



Chevrolet Performance 12562926 - Chevrolet Performance Big Block Chevy Service Replacement Cylinder Heads
Chevrolet Performance 12562926 - Chevrolet Performance Big Block Chevy Service Replacement Cylinder Heads

JEGS Part Number: 809-12562926

Gen V & Gen VI Service Replacement Head
  • Bare Head
  • 3/8'' Accessory Bolt Holes

    Chevrolet Performance Big Block Chevy Service Replacement Cylinder Heads

    The 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!

    Technical Notes:
  • Cast-Iron or Aluminum
  • 325cc Rectangular Intake Ports
  • 118cc combustion Chamber
  • Machined for 2.180"/1.880" (3/8" stems) Valves
  • Non-Adjustable Rocker Arm Design
  • Heat Risers
  • Will not work on Production Mark IV Blocks
  • Sold Individually

  • Chevrolet Performance 12562926

    Accessory Bolt Holes Drilled
    Yes
    Calculator
    Compression Calculator
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Style
    Open chamber
    Combustion Chamber Volume (cc)
    118
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Cast iron
    Cylinder Head Style
    Bare
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Round
    Exhaust Valve Diameter (in.)
    1.88
    Exhaust Valves Included
    No
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Port Shape
    Rectangular
    Intake Valve Diameter (in.)
    2.18
    Intake Valves Included
    No
    Locks Included
    No
    Machined for O-Ring
    No
    Oiling Style
    Through pushrod
    Quantity
    Sold individually
    Retainers Included
    No
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Center and perimeter bolt
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Material
    Steel
    Valve Seats Machined
    No
    Valve Springs Included
    No
    Valve Stem Seals Included
    No
    Manufacturer's Part Number:
    12562926
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