Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
Click for more details.

SMALL-BLOCK VORTEC CYLINDER HEADS

12558060

CAST-IRON VORTEC CYLINDER HEAD ASSEMBLY

  • Completely assembled with 1.940"/1.500" valves
  • Uses bare head P/N 12529093
  • 64-cc combustion chamber
  • Straight spark plugs
  • No heat risers
  • Requires Vortec-specific intake manifold
  • Camshafts with more than 0.475" lift require machining valve guide bosses and checking valve seal to valve spring retainer clearance
  • Can be machined for 2.020"/1.600" valves
  • Rocker arm studs can be pinned or drilled and tapped to 3/8"
  • Valve spring seat diameter is 1.280"
  • Casting number 10239906 or 12558062

VISIT OUR BRANDS FOR YOUR OE NEEDS

|

Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details.