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Knox Trailers · Cooling System
NAV400
In stock · ships from Knoxville
This is an aftermarket replacement radiator for International Navistar Durastar 4000 series trucks (model years 2008 and newer).
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It is a heavy‑duty all‑metal unit with a copper core and brass tanks, and includes an integrated oil cooler on the grille side. Radiators like this are replaced when the original becomes clogged, corroded, or fails to maintain proper engine temperature, helping protect the engine and transmission from overheating.
Part Number: NAV400
RADIATOR
Dealer: Knox Trailers
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