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Chevrolet Performance 12558060 - Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads



Chevrolet Performance 12558060 - Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads

JEGS Part Number: 809-12558060

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
  • $320.16
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    Chevrolet Performance 12558060 - Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads Details

    Cast Iron Vortec SBC Head

    Technical Specifictions:
  • Intake Valve: 10241743
  • Exhaust Valves: 12550909
  • Valve Spring Retainer: 10241744
  • Intake Seals: 10212810
  • Exhaust Seals: 12564852
  • Valve Springs: 10212811
  • Valve Locks: 24503856
  • Casting Number: 12558062

  • Specifications:

    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 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 Port Shape
    Square
    Exhaust Valve Diameter (in.)
    1.5
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    170
    Intake Valve Diameter (in.)
    1.94
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Number of Springs Per Valve
    Single
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.25
    Quantity
    Sold individually
    Retainer Material
    Steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    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:
    12558060

    America's favorite high-performance cast iron small block cylinder heads offer big power and bigger value. Chevrolet Vortec Cylinder Heads' fast burn combustion chamber and high-velocity ports combine to produce big horsepower. Vortec Heads can be mildly ported for additional performance and milled up to .040'' for increased compression ratio. The Vortec Heads come with various intake and exhaust valve sizes to complement the high-velocity port design and your performance needs. Vortec Heads outflow Bow Tie Heads right out of the box and are a 20 to 40 horsepower bolt-on increase over earlier cast iron small block heads. Vortec Heads require a Vortec-style intake manifold due to an improved manifold mounting flange and gasket design and raised intake ports. Modifying the heads to accept early intake manifolds is not recommended. Vortec Cylinder Heads fit all 1955-Present small blocks except LT1/LT4 reverse coolant flow engines and current LS1-style engines.

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    1965 CHEVROLET CHEVELLE

    • CC: 4638
    • Liter: 4.6
    • SubModel: SS
    • CUI: 283
    • EngineType: V8
    12558060 - Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads is rated 4.5 out of 5 by 2.
    • 2016-07-25T08:09CST
    • bvseo_cps, prod_bvrr, vn_cps_3.3.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_10001_10001_59290, PRD, sort_relevancy
    • clientName_jegs
    Rated 4 out of 5 by from Great heads for the money; super-fast shipping Even though their price has risen substantially, these GM Vortec heads are still a great value compared to properly rebuilt GM heads or new aftermarket heads. And I'm not sure any of the Vortec copies flow as well at low lifts (up to .500") as the real GM versions. That said, my heads' valve travel was only approx .480" before the retainers hit the guide seals. I was able to increase that to approx .510" by fully seating the seals using an old seal and 1/2" socket. That's more than enough (including safety margin) for my cam's .451" valve lift.
    Date published: 2014-12-26
    Rated 5 out of 5 by from Exactly as described! Product was delivered faster than promised and was great quality!! Don't bother shopping at any other parts suppliers, Jegs has it all.
    Date published: 2014-11-02
    • 2016-07-25T08:09CST
    • bvseo_cps, prod_bvrr, vn_cps_3.3.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_10001_10001_59290, PRD, sort_relevancy
    • clientName_jegs
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