Cummins Turbochargers by Engine Model

Choosing the correct Cummins turbocharger depends on engine model, emissions generation, CPL, and engine serial number. Below are some of the most common Cummins engines used in heavy‑duty and medium‑duty trucks.

Cummins ISX Turbochargers

The Cummins ISX platform is one of the most widely used heavy‑duty engines in North American trucking. Many ISX engines utilize advanced variable geometry turbochargers (VGT) to improve fuel efficiency, drivability, and emissions control.

Common ISX engine platforms include:

• Cummins ISX CM870
• Cummins ISX CM871
• Cummins ISX CM2250
• Cummins ISX CM2350

VGT turbochargers on ISX engines rely on electronic actuators and precise vane movement to control boost pressure. Common issues include actuator failure, vane sticking, and excessive shaft play.

Cummins X15 Turbochargers

The Cummins X15 engine replaced the ISX platform and remains one of the most common engines in modern long‑haul trucks. X15 engines use advanced turbocharger systems designed to deliver improved fuel economy and responsive throttle performance.

Common X15 applications include:

• X15 Efficiency Series
• X15 Performance Series

Correct turbocharger selection for the X15 is critical because part numbers and calibrations vary by CPL and emissions configuration.

Cummins ISB 6.7 Turbochargers

The Cummins 6.7L ISB engine is widely used in medium‑duty commercial trucks, service vehicles, and vocational applications. These engines often rely on variable geometry turbochargers to provide strong low‑RPM torque.

Common ISB applications include:

• Cummins ISB 6.7 CM2150
• Cummins ISB 6.7 CM2350
• Medium‑duty truck platforms

Turbo issues on 6.7 engines may include actuator faults, boost leaks, or carbon buildup affecting vane movement.

Cummins ISC & ISL Turbochargers

ISC and ISL engines are frequently used in regional trucking, vocational trucks, buses, and RV platforms. Turbocharger designs may vary depending on the model year and emissions system.

Common turbo models found on ISC/ISL engines include:

• HX35 series
• HX40 series
• HE341 series

Cummins N14 Turbochargers

The Cummins N14 remains common in many legacy fleets. These engines typically use large Holset turbochargers designed for durability and rebuildability in heavy‑load applications.

Signs You May Need a Cummins Turbo Replacement

• Loss of engine power or low boost pressure
• Black or blue exhaust smoke
• Oil leakage around the turbocharger housing
• Whining or grinding noises from the turbo
• Engine derate conditions or turbo fault codes

Driving with a failing turbocharger can lead to further engine damage, overheating, or aftertreatment issues.

Verify Fitment Before You Buy

Because Cummins turbochargers vary by engine model and configuration, it is important to confirm compatibility before ordering.

• Engine Serial Number (ESN)
• CPL number
• Truck year / make / model
• Existing turbocharger part number

Providing this information allows our team to confirm the correct turbocharger for your application.

Why Buy Cummins Turbochargers from Advanced Truck Parts?

• Fitment verification before purchase
• Quality aftermarket and OEM‑grade options
• Fast shipping across the U.S.
• Support for fleets, shops, and owner‑operators
• Competitive pricing on heavy‑duty diesel parts