Set of 2 Complete GM Chevrolet GEN V LT1 L86 CYLINDER HEAD OEM 12685669Condition: USED REBUILDABLE CORE The GM 12685669 6. 2L Cylinder Head is a crucial component for GEN V LT1 and L86 engines ensuring optimal performance and durability. This OEM part is precision engineered and often comes as a remanufactured or rebuilt set including casting numbers 12620549 and 12685669. These heads might require resurfacing before installation ensuring they meet factory specifications. They are essential for the proper functioning of