LS3 CNC-PORTED CYLINDER HEAD, GM PERFORMANCE ^Sale

88958758 CNC LS3 Cylinder Head Assembly Features:

The CNC-ported LS3 head features 276cc intake runners and 92cc exhaust ports, along with a combustion chamber volume of about 68.5cc. That's the same volume as stock LS3 heads, which maintains the stock compression ratio. It will fit any LS engine with cylinder bores of 4.000 inches or larger, including 6.2L L92 truck engines.

Each head is delivered fully assembled, with 2.165-inch hollow-stem intake valves and 1.59-inch solid-stem exhaust valves, as well as valve springs, valve locks, spring retainers and valve stem seals. The maximum recommended valve lift with the stock valvetrain components is 0.550-inch.

Aluminum performance head

• Fits any LS family engine with 4.00" bore or larger
• 2.165" hollow stem intake, and 1.59" solid stem exhaust valves
• .570" max valve lift
• CNC L92 style 276cc intake ports
• D-shaped exhaust ports
• CNC 68.5cc combustion chambers

Head 88958758 is assembled with the following components:

• 12569427 Intake Valves
• 10166344 Valve Spring Retainers
• 12582719 Exhaust Valves
• 12482063 Intake Valve Stem Seals
• 12586484 Valve Springs
• 12482062 Exhaust Valve Stem Seals
• 10166345 Valve Locks

NOTE: These are sold individually and will fit LH or RH side.