THE INTERNATIONAL S13 INTEGRATED POWERTRAIN IS READY FOR EPA 2027

Always looking ahead

It should come as no surprise that the International® S13® Integrated Powertrain needed only minimal updates to meet 2027 EPA standards. It was, after all, engineered with a clean sheet of paper and a long-term vision that anticipated future regulations. As a result, 90% of the powertrain's components carry over unchanged, which means your service tools, parts, technician training, and driver resources remain familiar, making the transition to the 2027 S13® Integrated Powertrain seamless.

Ready for EPA 2027

The 2027 S13 Integrated Powertrain features a double overhead cam design with Variable Valve Timing and an integrated compression release brake, along with a standardized 24V electrical architecture (alternator, starter, engine controllers), while retaining a 12V cab and electrical system for accessories and body controls. The engine, combined with the Dual Stage Aftertreatment System, is so effective at reducing emissions that neither a Diesel Oxidation Catalyst nor any EGR hardware is needed, reducing weight and complexity.

SHIFT WHAT'S POSSIBLE.

The existing International® S13® Integrated Powertrain is our most advanced, fuel-efficient and streamlined powertrain, available in the LT®, RH™, HX®, and HV™ series.

In fact, the International® LT® with the S13 Integrated Powertrain leads the on-highway aero category by at least 5% in fuel economy.*

Capable of up to 515 hp and 1,850 lb-ft of torque, the S13 Integrated consists of an engine, transmission and aftertreatment system designed together to maximize integration between systems while allowing each component to perform its function. The result is a new standard of efficiency, profitability and sustainability for our on-highway and off-highway customers.

Designed and developed from the ground up by a global dream team of engineers and proven over more than 4 million miles across a variety of terrains, the S13 Integrated is the last diesel powertrain we will ever produce—and, without question, our best.

*The International® LT® with S13® Integrated Powertrain was tested head-to-head using TMC Type IV testing methodology against competitive on-highway aero models with comparable specifications: Freightliner Cascadia AeroX DD15, Kenworth T680 MX13, Volvo VNL760 D13. Testing proved the International LT with S13 Integrated Powertrain to be at least 5% more fuel efficient than these models. The International LT with S13 Integrated Powertrain uses up to 3.5% more DEF per gallon of fuel compared to comparable on-highway aerodynamic models.

S13® ENGINE DELIVERING SUPERIOR OPERATING ECONOMY

Through extensive testing, a new cylinder and piston head design with maximum cooling properties was created. This new double overhead cam design directly equates to less fuel being consumed. But that’s not all. Thanks to the new Dual Stage Aftertreatment system, the heavy and expensive EGR cooler is no longer needed to reduce emissions. Its absence means a more reliable and robust engine that maximizes exhaust flow through the turbo to enhance performance and efficiency.

Delivering the goods

The S13 Engine can operate at low rpm with high torque which equates to less fuel consumed while still delivering up to 515 hp and 1,850 lb-ft of torque. This incredible engine brings undisputed economy through its unique, clean burn technology.

T14® TRANSMISSION STELLAR PERFORMANCE

Keeping the driver comfortable, informed and empowered has been a mantra at International for decades as part of our DriverFirst™ Philosophy. The S13 Integrated Powertrain takes it a step further by offering a smooth and quiet operation with superior capabilities. In fact, full torque is available at only 900 rpm and the transmission’s wide overall gear ratio means optimal efficiency on a variety of terrain while still delivering low speed performance. And when descending, drivers can rely on the new compression release brake to deliver strong, secure braking power up to 470 hp.

Making the shift

The fully automated T14® transmission was designed in-house from the ground up. It’s a 14-speed overdrive transmission that is optimized to deliver peak fuel economy performance in direct drive (13th gear) during typical load, while still allowing the ability to go into overdrive when lightly loaded or empty. The transmission has an electronically controlled clutch actuator that works in sync with the engine to deliver faster, smoother shift performance. Since it does not consume air during complicated maneuvers — like when you’re backing a trailer into a tight loading dock – the driver never needs to stop and let the air recharge. The T14 also uses an integrated oil to water coolant system to optimize temperature regulation in both hot and cold environments.

DUAL STAGE AFTERTREATMENT SYSTEM EASY SERVICEABILITY

The entire powertrain was designed to allow each individual component — engine, transmission and aftertreatment — to focus on doing what it does best. Eliminating the EGR cooler is a prime example. Instead of trying to control NOx emissions inside the cylinder, the engine operates with zero EGR during regular operation, so it can focus on generating more power. Plus, no EGR during normal operations means 100% of the exhaust flow goes through the turbo allowing the use of a simple, more reliable fixed vane turbocharger.

Next-gen aftertreatment

Because there’s no EGR during regular operation, NOx must be treated a different way. To do this, the engineers developed an all-new Dual Stage Aftertreatment design that injects a first dose of DEF just downstream of the turbo in the evaporator tube and a second dose inside the aftertreatment container. Since cooled EGR has been eliminated from the combustion chamber, much less soot or particulate matter is generated. This allows for extended service intervals and eliminates the need for active regens. In fact, the cleaner combustion cycle generates so much less soot the engineers were able to eliminate the need for a diesel oxidation catalyst (DOC) in the aftertreatment system. Combined, the aftertreatment system provides a simple, reliable solution that’s easily serviceable.

VIEW TORQUE CURVES

Several versions of the S13 Integrated Powertrain can be ordered — each with a different horsepower rating, allowing you to match the right engine to your specific application. All versions provide abundant torque at low RPM that is maintained through peak horsepower, giving drivers the muscle they need for the toughest jobs.

View vehicle-specific torque curves in the specifications below.

S13 Integrated Brochure

2027 S13 Integrated Powertrain HX/HV Series Spec Card

S13 Integrated HX/HV Series Spec Card

S13 Integrated LT and RH Series Spec Card

T14 Transmission Brochure