International Engines

HEAVY-DUTY DIESEL · MANUFACTURER

International Engines

A26 · S13 — International Truck Diesel Engines Available by Request

A26 — International’s Flagship Current-Generation Engine

12.4-litre inline-six — OEM to International LT, RH, and HX Series trucks

INTERNATIONAL · A26

International A26 — 12.4L Inline-6 Diesel

12.4L · 2017–Present · International LT 625, LT 600, RH Series, HX Series

The International A26 is International Trucks’ proprietary 12.4-litre inline-six diesel engine, introduced in 2017 to replace the MaxxForce platform that had experienced widespread reliability issues. Developed in-house by International (Navistar), the A26 features high-pressure common rail injection, a variable-geometry turbocharger, and EGR/SCR aftertreatment for current EPA compliance. Power outputs range from approximately 400 to 475 horsepower. The A26 is OEM to International LT, RH, and HX Series trucks only — fitment in other OEM chassis requires independent verification.

✓ Availability by Request

INTERNATIONAL · A26 — USED & REBUILT

A26 — Used & Remanufactured Units

12.4L · 2017–Present · Used/Rebuilt Market — Engine Serial Required

As the A26 platform matures, the used and rebuilt market for replacement units continues to grow, particularly in fleets operating older International LT and RH Series trucks. When sourcing a used or rebuilt A26, the engine serial number and original truck VIN are required to ensure correct ECM compatibility and aftertreatment system matching. Remanufactured A26 units vary significantly by rebuilder standard — Canada Parts Exports will include sourcing details and rebuild specification in confirmed quotes.

✓ Availability by Request

S13 — International’s Integrated Powertrain Engine

12.4-litre with fully integrated International S13 Integrated Powertrain technology

INTERNATIONAL · S13

International S13 — 12.4L Integrated Powertrain Diesel

12.4L · 2024–Present · International S13 Integrated Powertrain — International LT, LT Plus

The International S13 Integrated Powertrain is International Trucks’ next-generation platform, introduced with the new International S13 Integrated Powertrain system. The S13 engine is paired with a proprietary transmission and powertrain control system designed to operate as an integrated unit rather than as discrete components. This tight integration means that sourcing the engine independently from the full powertrain requires careful system verification. The S13 is the current OEM specification for new International LT Series trucks. Being a newer platform, used market availability is limited and confirmation-dependent.

✓ Availability by Request

What to Include in Your International Engine Inquiry

Engine Model

A26 or S13. These are distinct platforms with different integration requirements.

Engine Serial Number

Found on the engine dataplate. Required for ECM matching, build date, and emissions configuration identification.

Truck VIN

The VIN is particularly important for A26 ECM calibration matching, and essential for S13 integrated powertrain verification.

Truck Make, Model & Year

International A26 and S13 engines are OEM to International Trucks. Fitment in other makes requires independent verification.

Destination

Country, city, and postal code required for shipping estimation and export documentation from Canada.

Compatibility Notice: International A26 and S13 engines are proprietary to International Trucks (Navistar) and are OEM for specific International truck models. Fitment in Kenworth, Peterbilt, Freightliner, Volvo, or Mack trucks requires independent technical verification. Canada Parts Exports does not confirm cross-brand compatibility based on engine model alone. The S13 Integrated Powertrain is designed as a full-system unit — sourcing the engine in isolation from the transmission requires additional verification.

Source an International Engine

Canada Parts Exports sources International A26 and S13 engines from the Canadian market. Submit your inquiry with engine serial and truck details for confirmed availability and pricing.