Description
GM LS2 L77 L98 LS3 Cylinder Head 821 Assembled.
GM Chevrolet Performance LS3 “821” Cylinder Head. Fully complete cylinder head that will fit any LS engine with a 4″ bore or greater (LS2 6.0L /LS3 6.2L). 68cc chamber. Replaces the 12629063 head and is an upgrade from 12629064. Price is for one head.
Includes:
- 2.165″ Hollow Stem Intake Valves
- 1.590″ Stainless Exhaust Valves
- 0.550″ Lift Springs
- Retainers & Locks
Manufacturer Part Number: 12675871














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