International Radiator - Northern Radiator 238783, Active Radiator Supply Company 640124, LT9487, Reach Cooling 42-10998

If you are sourcing a replacement radiator for an International 5900i or 9900i, the Reach Cooling 42-10998 is an aftermarket unit engineered to meet or exceed OEM specifications. It directly replaces OEM 1102779 and cross-references Northern Radiator 238783, Active Radiator Supply Company 640124, and LT9487, covering the 2015-2017 International 5900i 14.9L and the 2018 International 9900i 14.9L. The aluminum core features B-type tubes with central reinforcement for greater pressure tolerance and reduced tube failure, while the deep extrusion header creates a stronger tube-to-header joint that stands up to vibration and thermal expansion without leaking. Folded fin edges improve stability and heat disbursement, and thermal expansion cuts throughout the core allow for proper expansion and contraction during normal heat cycles, extending service life. A transmission oil cooler is included with fittings spaced 292 mm apart, and multi-fit attachments provide flexible installation across applications without sacrificing precise fit. With a top-left inlet and bottom-right outlet, both measuring 2.52 inches in diameter, this down-flow radiator is a correct, confidence-inspiring replacement for your International heavy-duty truck.