88958758 - CNC LS3 Cylinder Head Assembly FREE Shipping

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
• .550" 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
• 12625033 Valve Springs
• 12482062 Exhaust Valve Stem Seals
• 10166345 Valve Locks

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