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12578450 - LS7 (Gen III) CNC Cylinder Bare Head

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

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12578450
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Description

Complete GM LS7 Bare Cylinder Head

  • 356-T6 aluminum
  • Fully CNC'd ports & chambers
  • C5R / LS7 rectangle port design - Requires intake manifold part number 25534394 or 12568976
  • 12 valve angle
  • Designed for big bore blocks: LS7, C5R, LSX or Warhawk
  • 270cc CNC'd intake ports
  • 85cc CNC'd exhaust ports
  • 70cc CNC's combustion chambers
  • All fasteners are metric
  • capable of over 600 HP
  • Complete head # 12578449 is also available

Head requires 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:

Lift.100".200".300".400".500".550".600".700"
Intake Flow71145222271315332348352
Exhaust Flow60120159192207214219221

Application List

Universal

Details

Categories

Shipping Information

  • Item Requires Shipping
  • 21.7 lbs.
  • W8.5000” x H6.4000” x L21.2000”
  • No Longer Available

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