Genuine GM LS3 Complete Cylinder Heads x2
- Includes Valves, Valve Springs, Retainers and Locks
- 2.165" Hollow Stem Intake Valve / 1.590" Solid Stem Ex.Valve
- 260cc Intake Runner
- 68.4cc Chamber
- 0.550" Maximum Valve Lift
- 821 Casting Cylinder Head
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