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Chevrolet Performance 12363390

Big Block Chevy Oval Port Aluminum Head 110cc Combustion Chamber 2.25" Intake/1.88" Exhaust Valves

Chevrolet Performance 12363390

809-12363390

Chevrolet Performance 12363390 Big Block Chevy Oval Port Aluminum Head 110cc Combustion Chamber 2.25" Intake/1.88" Exhaust Valves $1,008.63
Big Block Chevy Oval Port Aluminum Head
  • 110cc Combustion Chamber
  • 2.25" Intake/1.88" Exhaust Valves
  • 11/32'' Valve Stem
  • 290cc Intake Port
  • 110cc Exhaust Port
  • Completely Assembled, Sold Individually

  • Chevrolet Performance 12363390 Details

    Street Cylinder Heads

  • Oval Port

    Assembly notes:
  • Use intake gasket 809-12366985
  • Intake Bolt Kit 809-12367959
  • Mark IV Use Head Gasket 809-12363414 for bores to 4.370" & 809-12363413 for bores 4.470" to 4.540"
  • Gen V & VI Use Head Gasket 809-12363412 for bores to 4.370" & 809-12363411 for bores 4.470" to 4.540"
  • Use Head Bolt Kit 809-12367779

    Technical Specifications:
  • Intake Valves: 12366987
  • Exhaust Valves: 12366988
  • Retainers: 12366990
  • Valve Locks: 12366992
  • Valve Springs: 12462970
  • Valve Seals: 12495690
  • Valve Spring Shims: 3875916
  • Rocker Arm Studs: 3921912
  • Pushrod Guideplates: 3860038

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Style
    Semi-open
    Combustion Chamber Volume (cc)
    110
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    D-Port
    Exhaust Valve Diameter (in.)
    1.88
    Exhaust Valves Included
    Yes
    Guideplates Included
    Yes
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Port Shape
    Oval
    Intake Runner Volume (cc)
    290
    Intake Valve Diameter (in.)
    2.25
    Intake Valves Included
    Yes
    Lock Style
    10 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.68
    Number of Springs Per Valve
    Dual
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.55
    Quantity
    Sold individually
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nut Thread Size (in.)
    7/16"-20
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Steam Holes Drilled
    No
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Material
    Steel
    Valve Seats Machined
    No
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Umbrella
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    12363390

    Chevrolet Performance Bow Tie Cylinder Heads are an ideal combination of street drivability and drag strip performance. They provide a broad power range with ample low-end torque, excellent throttle response, good mid-range torque and enough top-end power to beat your competitors to the finish line! Bow Tie Street Cylinder Heads have rectangular or oval intake ports. Rectangular intake ports are larger in volume and designed to enhance high-RPM horsepower. These heads are best for vehicles that see frequent drag strip action. Cylinder heads with oval intake ports are smaller in volume and designed for greater low-RPM torque. Oval port heads are best for street applications where lots of bottom-end off-the-line power is desired.

    Chevrolet Performance Bow Tie Race Cylinder Heads are designed for monster-cubic-inch stroked big blocks to maximize their performance potential. They're made of 356-T6 aluminum with huge, raised intake ports; larger valves; smaller combustion chambers; and two additional head bolts for increased clamping force. The runners are purposely left smaller to accommodate custom porting.

    Features
  • 356-T6 aluminum
  • Rectangular or oval ports
  • Will work on Mark IV and Gen V/VI blocks
  • 9/16" thick decks
  • As-cast intake and exhaust ports
  • 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

  • Does Chevrolet Performance 12363390 fit your vehicle?

    Narrow Results

    1971 CHEVROLET CHEVELLE

    • CC: 4098
    • Liter: 4.1
    • SubModel: NOMAD
    • CUI: 250
    • EngineType: L6 ( 4.1 L / 250 )

    1971 CHEVROLET CHEVELLE

    • CC: 5736
    • Liter: 5.7
    • SubModel: NOMAD
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • SubModel: NOMAD
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971 CHEVROLET CHEVELLE

    • CC: 5031
    • Liter: 5.0
    • Aspiration: N
    • SubModel: NOMAD
    • Engine Vin: CA
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )
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