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Cummins ISX2 Signature 600 turbo HE600WG front view

HE600WG HX60W 4090043 4043620 Turbocharger for Cummins ISX2 Signature 600

The HE600WG / HX60W is the Holset turbocharger for the Cummins ISX2 non-EGR, ISX3, and Signature 600 engines — the highest-output ISX platform at 600 HP. This is a large-frame turbo with a water-cooled bearing housing designed for the extreme exhaust temperatures at 600 HP. It fits 2006-2008 ISX2 applications as well as Signature ISX3 and some Volvo trucks and Komatsu industrial gen sets running the ISX2. Holset assembly 4043620, Cummins OEM 4090043. Our HE600WG ships new with all new components, dynamically balanced, with gaskets. We supply shops, fleets, and distributors.

Turbo Model

HE600WG / HX60W (fixed geometry, water-cooled)

OEM / Interchange Numbers

  • 4090043
  • 4043620
  • 4025320
  • 4025320NX
  • 4025320RX
  • 4089760
  • 5324942

Application

2006-2008 Cummins ISX2, Signature ISX3, Signature 600; fixed geometry, water-cooled, pneumatic wastegate

Service & Support

  • 1-Year Unlimited-Mileage Warranty
  • US Stock, Fast Dispatch
  • Bulk Orders Welcome
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FAQ

The HE600WG / HX60W (4090043 / 4043620) fits the 2006-2008 Cummins ISX2, Signature ISX3 and Signature 600 engines. OE and interchange numbers include 4090043, 4043620, 4025320, 4025320NX, 4025320RX, 4089760, 5324942. If your number is not listed, send it with the old part's dataplate photo and we confirm the match before shipping.

No. The HX55W (4046127) is a different, smaller-frame turbo also used on 600 HP ISX engines. They serve different ISX generations and do not interchange. Match by part number on the turbo nameplate.

Yes. The bearing housing has coolant passages in addition to oil lubrication. Connect both coolant lines and bleed the system during installation.

Brand new, 100% new components, dynamically balanced. Ships with gaskets. No core charge. One-year unlimited-mileage warranty.

Yes. US stock, volume pricing for shops, fleets, rebuilders, and distributors.

HE600WG / HX60W: The 600 HP ISX Turbo

The HE600WG is the largest turbo in the Cummins ISX lineup. It serves the non-EGR ISX2 and Signature 600 engines — trucks that were built for maximum power before EGR and VGT turbos became standard. At 600 HP, exhaust gas temperatures are extremely high, and this turbo is designed to handle that with a water-cooled bearing housing and heavy-duty materials throughout.

HE600WG vs HX55W — two different 600 HP ISX turbos

Both the HE600WG and the HX55W (4046127) are used on 600 HP ISX engines, but they are different turbos for different ISX generations:

DetailHE600WG / HX60W (this page)HX55W
EngineISX2 non-EGR, Signature ISX3ISX2 Signature 600, QSX15
Key part #4090043 / 40436204046127 / 4090042
Frame sizeLarger (HX60W frame)Smaller (HX55 frame)
Bearing coolingWater + oilWater + oil

Match by part number on the turbo nameplate. These two turbos are physically different sizes and do not interchange.

Applications

  • 2006-2008 Cummins ISX2 non-EGR trucks
  • 2001-2011 Cummins Signature 600/ISX3 trucks
  • 2001-2004 Volvo trucks with Cummins Signature ISX3
  • 2000-2008 Komatsu Industrial Gen Set S500 with ISX2

Common failure modes

  • Bearing wear — the 600 HP rating pushes shaft speed and bearing load hard. Bearing wear is the most frequent failure on high-mileage units.
  • Coolant seal failure — the water-cooled bearing housing uses O-rings that degrade from heat cycling. Replace all coolant seals on install.
  • Turbine housing cracks — the extreme EGT at 600 HP accelerates thermal fatigue. Inspect the housing for cracks at every service interval.

Cross Reference Numbers

This turbocharger replaces the following OE and interchange numbers:

  • 4090043
  • 4043620
  • 4025320
  • 4025320NX
  • 4025320RX
  • 4089760
  • 5324942

Related configuration: HX55W 4046127.

Installation and Care

  • Find out why the old turbo failed before installing the new one. Oil starvation or contaminated oil will destroy the replacement the same way.
  • Change the engine oil and filter. Flush or replace the oil feed line.
  • Replace the coolant O-rings at the bearing housing. Connect the coolant lines and bleed the system before startup.
  • Replace the exhaust manifold and oil drain gaskets. Prime the turbo with clean oil before startup.
  • Verify pneumatic wastegate movement before loading the engine.

See our quality process for details.

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