The GM Casting 799 LS2 LS6 Gen III Gen IV Cylinder Head Assembly is an OEM part manufactured by General Motors. It is a direct replacement cylinder head made of aluminum, suitable for LS series engines. The product comes with a 90-day manufacturer warranty and is finished in new condition. The part number is 12629058, and it is interchangeable with other part numbers like 243 and 799. Ideal for those looking for high-quality, genuine GM parts for their vehicle's engine.