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Chevrolet Performance SBC Cast Iron Vortec Cylinder Head 170cc Intake Ports

809-12691728


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SBC Cast Iron Vortec Cylinder Head 170cc Intake Ports
$691.74
Small Block Chevy Cast Iron Vortec Cylinder Head
  • 170cc Intake Ports
  • 64cc Combustion Chambers
  • 1.940'' Int/1.500'' Exh Valves
  • .475'' Max Lift
  • Straight Plug
  • Assembled, Sold Individually
  • QTY

    Specifications:

    Part Type
    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Casting Number
    10239906 or
    Combustion Chamber Volume
    64
    Combustion Chamber Volume (cc)
    64
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Cast iron
    Cylinder Head Style
    Assembled
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Valve Diameter
    38.1
    Exhaust Valves Included
    Yes
    Grade Type
    Performance
    Guide Plates Included
    No
    Guideplates Included
    No
    Heat Crossover
    No
    Height (in)
    6.75
    Intake Port Location
    Standard
    Intake Runner Volume
    170
    Intake Runner Volume (cc)
    170
    Intake Valve Diameter
    49.27
    Intake Valve Lift (in)
    1.94
    Intake Valves Included
    Yes
    Length
    22.5
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Material
    Iron
    Number of Springs Per Valve
    Single (inner spring)
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring
    1.25 in (31.8 mm)
    Package Depth
    6.00
    Package Height
    9.00
    Package Width
    22.00
    Part Category
    Performance Parts
    Part Fitment
    Semi Universal
    Plug Type
    Straight
    Port Type
    Vortec
    Quantity
    Sold individually
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Shipping Weight
    47.58
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Angle (deg)
    23
    Valve Cover Mounting Style
    Centerbolt
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Material
    Steel
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Umbrella
    Valve Stem Seals Included
    Yes
    Weight
    46
    Width
    9.12

    Will they fit a1979 4 bolt main 350 5.7L

    Asked by: Rebuild Bobby
    Yes, Chevrolet Performance 12691728 Can be used on 79 350 with a Vortec intake manifold.
    Answered by: Seth
    Date published: 2025-03-19

    Would these require a ECM tune?

    Asked by: Aftermarket heads
    The GM 809-12691728 cylinder head does not require a tune.
    Answered by: jshook
    Date published: 2025-01-23

    safe for e85?

    Asked by: robc
    The GM 809-12691728 cylinder head can be used with E85.
    Answered by: jshook
    Date published: 2024-10-02

    Will these heads fit on a 1996 Chevy Tahoe 4WD LS with engine code R?

    Asked by: Tyboy
    The GM 809-12691728 cylinder head will fit a '96 Tahoe 5.7.
    Answered by: jshook
    Date published: 2024-03-15

    Will they work on lt1 97 firebird

    Asked by: Shannon
    The GM 809-12691728 cylinder head does not fit a '97 LT1 engine.
    Answered by: jshook
    Date published: 2024-01-12
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