Mack, Volvo Radiator - Northern Radiator 238806, Active Radiator Supply Company 7300-62, Serck FLA000457, Reach Cooling 42-11017

When your Mack or Volvo radiator needs replacing, the Reach Cooling 42-11017 delivers a direct aftermarket solution built to meet or exceed original equipment specifications. This radiator replaces OEM 21000733 and cross-references Northern Radiator 238806, Active Radiator Supply Company 7300-62, Serck FLA000457, and LT9372, making it straightforward to confirm the right fit for your truck. The aluminum core features B-type tubes with central reinforcement for greater pressure tolerance, deep extrusion headers that resist vibration and thermal expansion at the tube-to-header joint, folded fin edges for added stability and heat disbursement, and thermal expansion cuts that allow the core to breathe through normal heat cycles and extend service life. Longer header tabs and included multi-fit attachments broaden vehicle coverage without sacrificing OE fitment. A transmission oil cooler is built in, with fittings spaced 292 mm apart. This down-flow radiator fits 2008-2016 Mack CHU, GU4, GU5, GU7, and GU8 models across 8.9L, 10.8L, and 12.8L engines, as well as 2014-2016 Volvo VAH and 2015-2016 Volvo VHD in 10.8L and 12.8L configurations. If you are sourcing by OEM 21000733 or any of the listed interchanges, Reach Cooling 42-11017 is the confirmed replacement.