5/8 Plug for all GM Quick Connect Fittings
The GM 5/8 Quick Connect fittings can be found in a number of locations. All supercharged cars like the LSA, LS9, LT4 and LT5 have this type of fitting. Our billet version could be used as a plug during service to avoid coolant spillage all over your workspace. It can also be used as a permanent plug in areas like the PCV drain back line found in the oil pan of all LT1/LT4 engines with the black plastic PCV tube that runs down to the oil pan, this plug will cap off the oil pan allowing you to delete the plastic tank and hardline. There are many other uses for this plug in the cooling system and oil cooler lines.
