This Jayrad JR7907HD radiator steps in when the original core on your Isuzu NPR or F-series truck can’t keep temps steady on a long pull. The 620 mm tall and 594 mm wide core gives plenty of face area for airflow when you are hauling up a freeway climb. A 36 mm thick core helps the engine stay in its sweet spot while the 38 mm inlet and outlet line up with factory hoses. The unit slots into 2007-on NPR250, NPR300, NPR750 plus matching FSS550, FRD500, FRR500 and FRR550 bays with that same 620 x 594 mm footprint. A 36 mm core thickness gives a solid balance between cooling punch and fan clearance in tight engine bays. Built-in transmission cooler ports suit driveline setups that see constant work at GVM. It is smart buy gear for trucks that get out there week after week in Aussie heat.

• Suits Isuzu NPR250, NPR300, NPR750 manual models
• Also suits FSS550, FRD500, FRR500, FRR550 2007-on
• Core height measures 620 mm
• Core width measures 594 mm
• Core thickness is 36 mm for added capacity
• Inlet and outlet both 38 mm diameter
• Integrated transmission cooler provision in tank
• Direct-style replacement footprint for factory radiator
• Ideal for towing and heavy commercial use
• Jayrad heavy-duty specification radiator unit

Q: Does this radiator fit automatic transmission models?

This JR7907HD radiator is specified for manual transmission applications. The core dimensions of 620 mm by 594 mm and 36 mm thickness match 2007-on manual NPR and selected F-series layouts. Automatic models can use different tank and cooler arrangements. Always cross-check your OEM part number and transmission type before ordering.

Q: Do I need to modify hoses to suit the 38 mm inlet and outlet?

In most factory-matched applications the 38 mm inlet and outlet will align with existing hoses. The measurement refers to the outside diameter of the pipe stubs. If your current radiator uses a different diameter you may need replacement hoses. It is worth checking hose markings or measuring the old unit before fitting.

Q: Is the transmission cooler internal or external on this radiator?

This radiator includes provision for an internal transmission cooler. The cooler sits inside the tank and uses dedicated line fittings on the end tank. This setup keeps oil and coolant separated while allowing heat transfer. You can retain existing cooler lines if they share the same thread type and position.

Q: What checks should be done before installing this radiator?

You should confirm all dimensions and mount points match the removed unit. Check the 620 mm height, 594 mm width, 36 mm thickness and 38 mm hose outlets against the old radiator. Inspect fan shroud mounts and bracket locations. A test fit before filling coolant helps avoid leaks or clearance issues once the system is full.

Suitable for Isuzu NPR250, NPR300, NPR750 manual transmission models plus FSS550, FRD500, FRR500 and FRR550 from 2007-on. Check core height 620 mm, width 594 mm and thickness 36 mm against the existing radiator before install. Confirm inlet and outlet diameter of 38 mm matches factory hose size. Professional installation is recommended for correct coolant bleeding and transmission cooler line connection.