cylinder heads


Through March 31, get a $100 mail-in rebate on any two Chevrolet Performance cylinder heads.

Go with the airflow

Chevrolet Performance cylinders are tested for excellence for durable performance on street or strip.


Great cylinder-head airflow has been a key enabler of the LS-Series’ exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads — from the LS6 heads for smaller-displacement engines to LS7 style heads for 427-inch-and-larger combinations, our aluminum heads benefit from Chevrolet Performance’s extensive research and development program, providing airflow.

Aluminum LS Family Head Technical Notes

  • Manufactured from 319-T5 aluminum alloy
  • High-efficiency combustion chambers
  • Symmetrical intake and exhaust ports
  • Angled spark plugs (14 mm; 5/8" hex; 3/4" reach; taper-seat plugs)
  • 15° valve angle (except C5R and LS7)
  • Bolt-down-type rocker arms (except LSX-DR, LSX-CT)
  • Center-bolt valve cover hold-downs
  • Fits Gen III and Gen IV Small-Blocks only  


Extending the performance range of the LSX platform are Chevrolet Performance’s six-bolt LSX cylinder heads. Many are capable of flowing more than 400 cfm, and their six-bolts-per-cylinder clamping design gives them excellent strength. Explore your horsepower-building potential with LSX heads.

LSX Cylinder Heads Technical Notes

  • Uses 11mm (10) and 8mm (13) head bolts (not included)
  • Accommodates production valvetrain components (except for Drag Race and Circle Track heads)
  • Includes premium beehive-type valve springs (except for Drag Race and Circle Track heads)
  • Extra material cast in the port areas to accommodate professional porting
  • Valve guides for 8mm valve stems, except DR & CT

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Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.