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12629063 LS3 Cylinder Head Assembly Features:
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
As-cast L92 style 260cc intake ports
D-shaped exhaust ports
As-cast combustion chambers
Head 12615879 is assembled with the following components:
Exhaust Flow
111
152
174
183
189
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 Intake Manifold Gasket Seal Kit
GM Performance Exhaust Manifold Gasket
GM Performance CNC LS3 Cylinder Heads
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