Cast Iron Vortec Cylinder Head Assembly


  • Cast iron Vortec replacement cylinder head
  • Completely assembled with 1.940″/1.500″ valves
  • Uses bare head 12529093
  • For engines P/N 19258602, 19210009, 12499101, 19210007 and 19210008
  • Replaces 12558060
Due to world events we are working with our manufacturers every day to ship and receive parts. If the part you are looking for is time sensitive please give our team a call at 855-806-1147 before ordering to ensure it's availability.

Cast-Iron Vortec Cylinder Head Assembly

P/N 12691728

– Completely assembled with 1.940″/1.500″ valves
– Uses bare head 12529093
– 64cc 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

This head is assembled with the following components:

  • 10241743 Intake Valves
  • 12550909 Exhaust valves
  • 10212811 Valve Springs
  • 24503856 Valve Locks
  • 10241744 Valve Spring Retainer
  • 10212810 Intake Seals
  • 12564852 Exhaust Seals

Additional Required Components:

  • 10105117 (2) Head Gaskets or
  • 12557236 (2) Head Gaskets
  • 10168525 (14) Bolts
  • 10168526 (4) Bolts
  • 10168527 (16) Bolts
  • 19300749 Spark Plugs

Engine Application: 19258602, 19210009, 12499101, 19210007 and 19210008


Vortec Cylinder Head Assembly

12558060 Chevrolet Cylinder Head


An easy way to gain 20-40 horsepower on any 1955-and-newer Small-Block Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling) is by installing a set of Vortec cylinder heads. These value-priced cast-iron cylinder heads use modified combustion chambers and high velocity port technology to provide improved performance. Vortec cylinder heads significantly outflow non-Vortec service replacement cylinder heads and earlier OEM cast-iron heads. These cylinder heads are ideal for applications up to 350 horsepower, but they require Vortec-specific intake manifolds.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to