12578449 - LS7 (Gen III) CNC 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
- 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
Related Install Parts:
New Coil on Cover Holley Valve Covers
GM Performance LS Head Bolt Package
GM Performance LS Head Gaskets
GM LS Valve Cover Bolts with Seal
GM LS Valve Cover Gasket Seal
GM Performance Exhaust Manifold Gasket
GM Performance Intake Manifold Gasket Seal Kit
- Item Requires Shipping
- 24.8 lbs.
- W8.5000” x H6.4000” x L21.2000”
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