LSX-DR CNC Ported Aluminum Cylinder Head


  • Fully CNC ported
  • Installed on LSX454R engine
  • Minimum 4.125″ bore
  • Capable of over 900 naturally aspirated HP

Out of stock

SKU: 19330894 Categories: ,

LSX-DR CNC-Ported Aluminum Cylinder Head

P/N 19330894

    • Fully

CNC ported

  • 356-T6 aluminum racing head
  • 5/8″ thick deck
  • LSX-DR rectangle intake port design – requires LSX-DR intake manifold
  • LSX-CT/DR spread port exhaust port pattern
  • Cast-in down-nozzle bosses (not machined)
  • Designed for up to 2.280″ intake and 1.620″ exhaust valves (4.165″ minimum bore)
  • Machined for 1.660″ valve springs; 11° valve angle
  • Minimum 4.125″ bore
  • 313cc CNC’d intake ports. 116cc CNC’d exhaust ports
  • 50cc CNC’d combustion chambers
  • Requires 19201808 shaft-mount Rocker Kit
  • Capable of over 900 naturally aspirated horsepower!
  • Installed on LSX454R engine assembly

Supersedes old P/N 19166979.


LSX-DR CNC-Ported Aluminum Cylinder Head

19330894 Chevrolet Cylinder Head

LSX-DR and LSX-CT Heads

The LSX-CT (Circle-Track) and LSX-DR (Drag Racing) cylinder heads feature raised-runner designs for improved airflow. Intake port configuration is similar to the competition-derived C5R head, but the ports are raised an amazing 10mm and the intake manifold bolt pattern is spread to accommodate additional port configurations.

Additional features include:

  • 11ᄚ valve angle (same as C5R head)
  • Accommodates up to 1.660″ diameter valve springs
  • Raised rocker rails
  • Requires shaft-mount rockers
  • May require special valve covers to clear shaft-mount rockers
  • Provisions for down-nozzle machining
  • 9ᄚ intake manifold angle ヨ requires new LSX DR or LSX CT intake manifolds
  • Unique LSX-CT/DR exhaust bolt pattern

Supersedes old P/N 19166979.

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