GM Performance Parts Cast Iron Vortec SBC Heads


GM Performance
GM Performance Parts Cast Iron Vortec SBC Heads

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Chevy Small Block Cast Iron Vortec Complete Assembly

America's favorite high performance cast iron small-block cylinder heads offer big power and bigger value. The GM (Chevy) Vortec cylinder heads fast burn combustion chamber and high velocity ports combine to produce big horsepower out of the box. Vortec heads can be mildly ported for additional performance and can be milled up to .040'' for increased compression ratio. The Vortec head uses 1.94'' intake valves and 1.50'' exhaust valves to compliment the high velocity port design. The Vortec head out-flows the bow-tie head out of the box and is 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 its improved manifold mounting flange and gasket design and raised intake ports. It is not recommended that the heads be modified to accept early design intake manifolds. Vortec heads fit all small-block engines produced 1955 to present, excluding LT1/LT4 reverse coolant flow engines and current LS1 style engines. Vortec heads come completely assembled with valves, springs, retainers, and 3/8'' rocker studs. Requires the use of self-aligning rocker arms.

  • Material: Cast Iron
  • Intake Port Volume: 170cc
  • Combustion Chamber Volume: 64cc
  • Vale Diameter: 1.94'' Int./ 1.50'' Exh.
  • Spark Plugs: Straight
  • Special Note: Valve Springs - .475 Max Lift

    These kits, put together by JEGS Professionals, include 2 GM Performance Parts SB-Chevy Cast Iron Vortec Cylinder Heads, JEGS Champion Series 331 Intake, 2 JEGS Head Gaskets, JEGS Intake Gaskets, JEGS Head Bolts, JEGS Intake Bolts.




  • 809-12558060
    SB-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

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  • $309.99
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    809-12558060K1
    Vortec Top End Kit Includes:
  • Cylinder Heads
  • Intake
  • Head Gaskets
  • Head Bolts
  • Intake Gasket
  • Intake Bolts
    More info on GM Performance 12558060K1
    Easy Kits
  • $880.99
    Ships