Racing Flag

PARTS INTENDED FOR COMPETITION USE ONLY.
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Racing Flag

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

LS/LT/LSX PRODUCTION AND C5R ALUMINUM HEADS

12629062

L92 CYLINDER HEAD ASSEMBLY 

  • Aluminum performance head
  • Fits any LS-family engine with 4.000" bore or larger
  • 2.165" solid-stem intake and 1.590" solid-stem exhaust valves
  • .510" max valve lift
  • As-cast L92-style intake ports
  • D-shaped exhaust ports
  • As-cast combustion chambers

12629063

LS3 CYLINDER HEAD ASSEMBLY 

  • Aluminum performance head
  • Fits any LS-family engine with 4.000" bore or larger
  • 2.165" hollow-stem intake and 1.590" solid-stem exhaust valves
  • .550" max valve lift
  • As-cast L92-style intake ports
  • D-shaped exhaust ports
  • As-cast combustion chambers

88958758

LS3 CNC-PORTED CYLINDER HEAD ASSEMBLY

  • CNC-ported version of the LS3 cylinder head
  • Flows about 10 percent more than the production head
  • More than 350 cfm (intake side) at .600" lift
  • 276-cc intake runners and 92-cc exhaust ports
  • Fits all LS engines with 4.000" bore or larger
  • 2.165" hollow-stem intake and 1.590" solid-stem exhaust valves
  • .550" max valve lift
  • D-shaped exhaust ports

19328743

LS9 CNC-PORTED HEAD ASSEMBLY

  • Special A356T6 aluminum roto-cast head casting for greater strength. The mold is rotated during production to create a stronger casting with improved mechanical properties.
  • Reinforced webbing and thicker deck (for minimal distortion) make it an excellent choice for supercharged and turbocharged engine combinations
  • CNC-ported for approximately 10 percent greater airflow (intake side) than the regular production cylinder head (similar to LS3 CNC-ported head P/N 88958758)
  • As-cast 66.5-cc combustion chamber volume
  • Fully assembled with production LS9 2.165" (55 mm) titanium intake valves and sodium-filled 1.590" (40 mm) exhaust valves and beehive-type valve springs
  • Valve springs rated for .570" max lift
  • Can be used on LS engines with at least a 4.000" bore using standard 11 mm head bolts in place of the LS9’s 12 mm head bolts

12578449

LS7 CNC-PORTED CYLINDER HEAD ASSEMBLY

  • 356-T6 aluminum head
  • Fully CNC’d ports and chambers
  • LS7 rectangle port design
  • Assembled with 2.200" titanium intake and 1.610" sodium-filled exhaust valves
  • 12° valve angle
  • Minimum 4.100" bore
  • 270-cc CNC’d intake ports, 85-cc CNC’d exhaust ports
  • 70-cc CNC’d combustion chambers
  • Capable of over 600 horsepower
  • Bare head available separately

12626958

LSA CYLINDER HEAD ASSEMBLY

  • CTS-V and ZL1 6.2L production cylinder head assembly
  • High-strength aluminum casting for supercharged application
  • Premium steel intake and exhaust valves
  • Completely assembled

25534393

BARE C5R RACING CUBED CYLINDER HEAD

  • The images represent a machined version of the cubed (unmachined) product. Chevrolet Performance does not supply a fully machined version of the C5R head. Image is for reference only.
  • 355-T7 “as-cast” aluminum racing head
  • Professional porting and machining of combustion chambers required
  • No seats or guide machining
  • C5R rectangle-port design – requires aftermarket rectangle-port intake manifolds
  • Designed for big-bore (4.100" min) LS7/C5R/LSX blocks
  • 210-cc “as-cast” intake ports
  • 70-cc “as-cast” exhaust ports, same as production LS6
  • 30-cc “as-cast” combustion chambers
  • All fasteners are metric
  • Capable of 800+ horsepower
  • Standard LS exhaust port design

12678972

LT1 CYLINDER HEAD ASSEMBLY

  • Replacement for production cylinder head assembly
  • Fully assembled  
  • Machined for direct fuel injection

19329839

LT1 CNC CYLINDER HEAD ASSEMBLY

  • Fully assembled
  • Machined for direct fuel injection
  • CNC machine-ported intake and exhaust runners
  • Included in Head and Hot Cam Kit  

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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.