88958622  - LS6 CNC-Ported Cylinder Head Assembly

• CNC-ported aluminum performance head
• 2.000" hollow stem intake, and 1.550" sodium-filled exhaust valves
• .570" max valve lift
• 250cc CNC’d cathedral-port intake ports
• 85cc CNC’d D-shaped exhaust ports
• 61.9cc CNC’d combustion chambers

P/N 88958622 is assembled with the following components:

12565311 Intake Valves 10166344 Valve Spring Retainers
12565312 Exhaust Valves 12482063 Intake Valve Stem Seals
12625033 Valve Springs 12482062 Exhaust Valve Stem Seals
10166345 Valve Locks