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19419193 LSX-LS7 Cylinder Head Assembly – As Cast, Replaces 19354239, 19328843, 19201806
• 6-bolt-per-cylinder bolt pattern• LS7 style rectangle port design• Assembled with 2.200" titanium intake and 1.610" sodium-filled exhaust valves• 12° valve angle; minimum 4.100" bore• 270cc "as-cast" intake ports, 85cc "as-cast" exhaust ports• 70cc "as-cast" combustion chambers• Handles .650" list with premium springs• Uses LS7 rocker arms/LS7 bolts