Original radiator but it'll only be there for about 3 more days. It's too small for my engine now that I've done some work to it.
Replacement radiators are easy enough to find. All you need are the measurements and horse power. Length, height, inlet and outlet locations and diameters. Really not a big deal.
Brass T fittings are plumbing parts at Lowes. Female thread T fittings with barbed nipples screwed in to fit the hoses. Both are the same size and the larger hose is cranked down a bit, the smaller was squeezed on.
