12564824
LS6 Cylinder Head Assembly
Fits any 1997'2008 LS Family engine*
2.00 hollow stem intake, and 1.55 sodium filled exhaust valves
.570 max valve lift
210cc 'cathedral port' intake ports
70cc D-shaped exhaust ports
65cc combustion chambers
Bare head P/N 12564825 available separately

Heads P/N 12564824, P/N 88958665 and P/N 88958622 are
assembled with the following components:
12565311 Intake Valves
10166344 Valve Spring Retainers
12565312 Exhaust Valves
12482063 Intake Valve Stem Seals
12586484 Valve Springs
12482062 Exhaust Valve Stem Seals
10166345 Valve Locks