BorgWarner Compound Turbo Assembly For International Navistar MaxxForce 7 6.4L Replaces 1889587C91, C92 & C93 TUR-105659-TDR

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1889587C91, 1889587C92 and 1889587C93 are International’s part numbers for the compound turbocharger assembly on the Navistar MaxxForce 7 6.4L diesel V8. BorgWarner has assigned part numbers 1000-970-0156 and 178905 to the same item. BorgWarner no longer sells them as a complete assembly though, so you would need to order each half of this compound turbo system by itself, as well as the installation kit that joins them together. Follow the links below to see the replacement options we have available.

High Pressure – Turbochargers Direct Remanufactured BorgWarner B1UG High PSI Turbo For MaxxForce 7 V152 TUR-102908-TDR

Low Pressure – Turbochargers Direct Remanufactured BorgWarner B2FS Low PSI Turbo For MaxxForce 7 V152 TUR-101380-TDR

Installation Kit - Turbochargers Direct Installation Kit TIK-100092-TDN

We recommend replacing both the high-pressure and low-pressure turbos at the same time – you have to pull the complete compound turbocharger assembly off the truck and disassemble it on your bench anyway, so it’s the same amount of labor that you don’t want to do twice. In addition to ordering each turbo half, you’ll also need an installation kit that includes all the gaskets and seals required to put both turbos together and mount them back on your truck.

If you go to the blog section of our website, you will find buyer’s guides for the MaxxForce 7 6.4L V8, MaxxForce 5 4.5L V6 and MaxxForce 11, 13 and 15 inline 6-cylinders. These may help you locate the correct replacement turbo, but we still strongly advise locating part numbers off your original turbo(s) before ordering to better ensure you receive the correct part. Contact us for knowledgeable assistance finding the turbo(s) you need!


When you buy a Turbochargers Direct brand remanufactured turbo, you will get a part that performs like new, or better. Not all reman turbos are the same quality, so make sure you know what you are getting. We are so confident in the superior quality of our Turbochargers Direct brand remanufactured turbos that we include a FREE 2 YEAR WARRANTY. Our rigorous remanufacturing processes and strict quality control standards ensure that you will receive a turbo you can rely on for years to come. 

This is guaranteed to be an exact fit replacement for the OEM Turbocharger and replaces the interchange part numbers listed on this page. This Turbocharger may also interchange with other part numbers. If you need help identifying the correct part for your application, please contact us for expert technical support. 

Product Type: Turbocharger 

Our SKU: TUR-105659-TDR 

Condition: Remanufactured 

Brand: Turbochargers Direct® 

Model: R2S B1 + B2 

Interchange Part Number(s): 1000-970-0156, 178905, 1889587C91, 1889587C92, 1889587C93 

Warranty: 24 Month - Industry Best Warranty 

Weight: 73.0 lbs