Peterbilt Radiator - Peterbilt AFX-000508, Northern Radiator SCSI239075, Active Radiator Supply Company 770035, Reach Cooling 42-10639

When your Peterbilt 357, 377, 378, 379, 385, 386, or 387 needs a new radiator, the Reach Cooling 42-10639 is the aftermarket replacement built to get you back on the road. This downflow radiator features a copper core and brass tanks in a three-row configuration, engineered to meet or exceed the original equipment specifications set by Peterbilt. It directly replaces Peterbilt AFX-000508 and Paccar Parts RAD42-10639TRP, and it cross-references Northern Radiator SCSI239075, Active Radiator Supply Company 770035, 1-800-Radiator 2401026, and NAPA NR4210639. Reach Cooling designed this radiator with reinforced B-type tubes for superior pressure tolerance, deep extrusion headers to resist vibration and thermal expansion at the tube-to-header joint, folded fin edges for improved heat disbursement, and thermal expansion cuts that allow the core to breathe through normal heat cycles without cracking or leaking. Multi-fit attachments extend coverage across the full range of Peterbilt 357, 377, 378, 379, 385, 386, and 387 applications from 1993 through 2007, spanning a wide variety of engine displacements. If you are sourcing by part number or tracking down a cross-reference, this is the direct replacement for AFX-000508 that fits without modification.