Cummins 6.7L ISB Holset VGT Turbocharger w/ Actuator (Reman) | Freightliner School Bus Turbo

When your Cummins 6.7L ISB turbocharger finally gives up (and it will), don’t get caught overpaying at the dealer or gambling on low-quality aftermarket units. Upgrade with a premium remanufactured genuine Holset VGT turbocharger from Momentum Worx—built to OE standards and ready to get your truck or fleet back on the road fast.

This is a direct replacement Holset turbo commonly found on Freightliner school buses and medium-duty Cummins 6.7 applications, and it comes complete with a NEW pre-calibrated VGT actuator, eliminating the need for dealer programming or downtime.

 Why Choose This Momentum Worx Holset Reman Turbo?

• Genuine Holset / Cummins Turbo Core – No cheap aftermarket castings
• Professionally Remanufactured to OE Specifications
• Includes NEW Holset VGT Actuator (Pre-Calibrated) – Plug & Play install
• Installation Kit Included – Gaskets, washers, and hardware
• Drop-In Replacement for Cummins 6.7L ISB Engines
• Ideal for Freightliner School Buses & Medium Duty Trucks
• Tested for Performance, Reliability, and Long Service Life

⚠️ The Reality of 6.7L Cummins VGT Turbos

The Holset VGT turbocharger on the Cummins 6.7 ISB is a known wear item. These turbos work hard—constantly adjusting vane position to optimize boost and emissions—which means failure is not a matter of if, but when.

Common failure symptoms include:

• Loss of boost / low power
• Sticking or failed VGT actuator
• Excessive smoke
• Turbocharger noise or shaft play
• Check engine lights & fault codes

Save thousands vs dealer replacement and get back to work with a unit built to outperform typical reman options.

Built the Right Way – No Shortcuts

At Momentum Worx, we don’t cut corners.

Our Holset-certified remanufacturing partner starts with a genuine Holset turbo core and rebuilds it using 100% OEM components, including:

• New bearings & seals
• Balanced rotating assembly
• Updated internal components
• Brand new genuine Holset actuator

Every unit is end-of-line tested to ensure proper boost, vane function, and reliability before it ships.

 Fitment – Cummins 6.7L ISB Applications

This turbocharger is commonly used in:

• Freightliner School Buses
• Medium-duty trucks with Cummins ISB 6.7L engines
• Various commercial and fleet applications

Not sure if this is the correct turbo for your setup?

We’ve got your back. Email us at INFO@MOMENTUMWORX.COM and our turbo experts will match you with the exact unit you need.

 Interchange / Cross Reference Part Numbers

This turbo replaces a wide range of OEM part numbers, including (but not limited to):

433521, 3771659, 4955397, 378677800H
2834847, 3786105, 4955398, 3786778H
2834989, 3786778, 4955543, 3799852H
2837246, 3791764, 5322099, 4955397NX
2837247, 3791772, 5325892, 4955397RX
2837259, 3791787, 5325908, 4955398NX
2839136, 3791788, 5325909, 4955398RX
2839138, 3791864, 378677800, 4955543NX
2839148, 3799852, 532209900, 4955543RX
2839149, 4043425, 1700321093, 532209900H
2839156, 4043429, 1700322651, 532209900HX
3060231, 4043430, 1700322652, 5322099HX
3771645, 4044384, 1700322966, 5322099NX
3771646, 4044385, 170-032-2651, 5322099RX
3771649, 4044394, 170-032-2652, TS2839136
3771658, 4047280, 170-032-2966, TS2839136R

Fleet Pricing Available

Running a fleet of buses or trucks with Cummins 6.7 turbos?

Bulk pricing available – Reach out to INFO@MOMENTUMWORX.COM for fleet discounts and priority fulfillment.

 The Bottom Line

This isn’t some mystery-box reman turbo.

This is a Momentum Worx-approved, genuine Holset VGT turbocharger built to keep your Cummins 6.7L ISB running strong, minimize downtime, and save you serious money.