Thanks for the kind words, but yea no hook ups, Just jegs for all the AN stuff. But -20 is the same ID as the water pump / thermostat housing on my ls engine. I bought -16 and it seemed small. The radiator came in the car when i purchased it, Probably going to buy a nicer core and weld An fittings on it. Just like to have it a little cleaner / better looking radiator. But this will be on down the road.