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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

    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

  • 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 Head uses 1.94'' intake valves and 1.50'' exhaust valves to complement the high-velocity port design. 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.

    JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need.

    Chevrolet Performance 809-12558060

    Manufacturer's Part Number:
    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
    • 2015-11-26T08:49CST
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