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19172377 - COPO LS7 CNC 6-Bolt Cylinder Head Assembly

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.



Complete GM LS7 Cylinder Head Assembly

  • 356-T6 aluminum
  • Fully CNC'd ports & chambers
  • C5R / LS7 rectangle port design - Requires intake manifold part number 25534394 or 12568976
  • Assembled with 2.20" titanium intake and 1.61" sodium filled exhaust valves
  • 12 valve angle
  • Designed for big bore blocks: LS7, C5R, LSX or Warhawk (Minimum 4.065" bore)
  • 270cc CNC'd intake ports
  • 85cc CNC'd exhaust ports
  • 70cc CNC's combustion chambers
  • All fasteners are metric
  • capable of over 600 HP
  • Bare head # 12575450 is also available

Head contains the following components:

12591644 intake valve

12578455 exhaust valve

12578457 valve spring

10166345 valve lock

12596508 valve spring retainer

12482063 intake stem seals

12482062 exhaust stem seals

12596509 intake lash cap

Flow Data:

Intake Flow71145222271315332348352
Exhaust Flow60120159192207214219221

Application List




Shipping Information

  • Item Requires Shipping
  • 30.0 lbs.
  • W24.0000” x H7.0000” x L10.0000”

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