Copper, 45.000 in. L, 5.375 in. W, 4.625 in. H, 21.000 in. C to c between coolant inlet and center mtg studs, 21.000 in. C to c between coolant outlet and center mtg studs, 0.750 in. Diameter of 2 threaded mtg studs located 3.594 in. C to c, 1.900 in. Od of threaded inlet and outlet, fittings provided