International Radiator - Northern Radiator 238510, Spectra Premium 2006-3508A, Active Radiator Supply Company 6400-58ST, Reach Cooling 42-10625

Reach Cooling 42-10625 is an aftermarket radiator built to replace the half-core cooling units on International Navistar trucks, directly cross-referencing Northern Radiator 238510, Active Radiator Supply Company 6400-58ST, Spectra Premium 2006-3508A, NAPA 20063508, Serck FLX000734, and Keystone Auto Industries HDC010010. Engineered to fit International 3600, 3800, 4200, 4700, 4700LP, 4800, and 4900 models from 1994 through 2006, this downflow radiator features a copper core and brass tanks sized at 26 in. wide by 31 in. tall with a 2.25 in. thickness, and comes with an 18 in. fan-side transmission oil cooler already integrated. B-type tubes with central reinforcement handle pressure spikes and reduce the likelihood of tube failure, while deep extrusion headers create a stronger tube-to-header joint that resists the effects of vibration and thermal cycling. Folded fin edges improve heat disbursement and structural stability, and thermal expansion cuts in the core allow for normal heat-cycle movement that extends service life. Top-center inlet and bottom-right outlet positions match OE routing, making installation straightforward. When your International medium-duty truck needs a reliable cooling system overhaul, this Reach Cooling radiator delivers the correct fit and OE-matched performance you need to get back on the road.