FL-151903

• Down-flow architecture routes coolant from the left-hand inlet across the 34-inch core, exiting at the bottom right to match OEM hose geometry and airflow paths on PACCAR MX-13 and Cummins ISX engines.
• Aluminum core with plastic tanks delivers high heat-rejection capacity while saving weight versus all-copper designs, supporting strict fuel-efficiency targets on aerodynamic long-hood tractors.
• Remote surge tank system eliminates a filler neck on the radiator, allowing a lower hood profile and easier top-tank service access.
• No in-core oil cooler simplifies maintenance; fleets running automatic transmissions retain the factory stand-alone cooler or heat exchanger.
• Frame flexibility: base part ships without frame for reuse of the original steel channels, while 770015PT / 770015ST arrive with pre-mounted side rails for quick swap-outs on wreck repairs or severe-rust trucks.

Heavy-duty down-flow radiator engineered for Kenworth T2000 and Peterbilt 367 / 387 / 587 built from the 2008 model year forward. It features a 34 × 39 × 2-inch aluminum core, 2.5-inch top-left inlet and bottom-right outlet, and a surge-tank cooling system. The low-profile, no-neck design maintains factory aerodynamics while providing OEM-level heat rejection for modern 13- to 15-liter engines.