International Engines
N9 N10 N13
Cummins Engines
Cummins ISB6.7 Cummins ISX15 Cummins ISL9

THE N13 Engine

Up to 475 HP, Up to 1,700 ft.-lb. Torque, 2,100 RPM

To succeed in a competitive business, you need an engine and an organization behind it that are always performing and working for you. Navistar’s N13 has revolutionized how the world looks at Class 8 commercial diesels. Designed specifically for International® brand heavy vehicles, with a combination of technologically advanced materials and components, these engines deliver outstanding fuel economy, excellent power characteristics, an exceptionally smooth and quiet ride, and high strength without added weight. And they’re backed by the largest dealer and service network in North America. Those advantages ensure your business will be “Always Performing.”



Outstanding Fuel Economy
N13 combines the most advanced engine technologies to deliver more torque and responsiveness at low rpm for outstanding fuel efficiency. A high-pressure common-rail fuel system, dual sequential fixed vane turbos, innovative heat-management system and low-friction design convert the highest percentage of your fuel into power you can use. And that adds up to low cost of ownership.
Excellent Power
N13 uses dual sequential turbochargers to deliver powerful performance from stop light to mountaintop. The smaller, primary turbo responds quickly for immediate take-off at low engine speeds, and the larger, secondary turbo provides peak power at higher speeds and on steep grades. Peak torque is achieved at 1,000 rpm and holds steady to 1,200 rpm, a much lower engine speed than other big bore engines. This means less down-shifting on hills and quicker up-shifts when accelerating.

Technologies responsible:

  • Instantaneous full power at near idle RPM
  • Strong launch performance with first high-pressure turbo
  • Interstage cooler increases air density to second low pressure turbo
  • Second turbo provides boost at higher RPM which delivers the power to get you moving
  • Fewer moving parts mean a lower cost of replacement than variable geometry turbos and sliding nozzle turbos

Key advantages:

  • Peak torque at 1,000 rpm
  • Better response for earlier up-shifts
  • Better lugging for fewer downshifts
Driver Comfort
How can the N13 engine deliver outstanding fuel efficiency, quiet operation and maximum durability? A key component is the North American heavy trucking industry's first Compacted Graphite Iron block. CGI has at least 75% higher tensile strength, 45% higher stiffness and near double the fatigue strength of gray iron. It carries the load quietly, with less vibration, without weighing you down. Keep in mind when it comes to compacted graphite iron it's not just the material, it's also the engineering. The CGI block material allows rib design to reduce engine noise. The block and oil pan mating surface is isolated with a large rubber gasket and flanged bottom block surface. The sound wave transmission is virtually eliminated.
Maximum Strength, Maximum Payload
How can N13 deliver outstanding fuel efficiency, emissions control with SCR, quiet operation and maximum durability? A key component is the North American Class 8 industry's only CG Iron block. This incredibly strong platform handles the loads that deliver the best fuel combustion and damps vibration and noise. It carries the load without weighing you down. Because CG Iron is so incredibly strong, castings don't have to be as thick and heavy in order to achieve the desired durability required for heavy-duty diesel. This results in up to 500 pounds of weight savings over traditional big bore engines cast from gray iron — which can translate to greater payload and bigger payback.


Engine Type
Diesel, 4-Cycle
Inline 6 Cylinder
2.4 L (758 cu. in.)
Bore & Stroke
4.96 in. & 6.54 in.
Compression Ratio
Two-Stage Turbochargers, Intercooler & Aftercooler
Combustion System
Direct Injection
Engine Lubrication
42 Quarts
Total Engine Weight
2,400 lbs
L 59 in. x W 37 in. x H 49 in.
4 Valves per Cylinder, Overhead Cam Actuated
B50 Design Life
1,200,000 miles


No matter what you throw at it, there’s just no stopping WorkStar.® With the broadest range of available powertrain options, it can muscle its way through even the heaviest loads and the most rugged jobs. Couple that power with an electrical system that offers body control functionality and more efficient diagnostics, and you’ve got a truck with the brains and brawn to keep your business running at its best. Huck-bolted frame and crossmember system designed for maximum vocational durability with a number of frame-rail options.

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ProStar+ is a driver’s truck. A more productive truck. The most efficient and innovative Class 8 truck on the road. How did we achieve this? By talking to fleet managers and drivers like you about the challenges you face and the features you need. After all, you’re the ones who turn our trucks into your home offices, the ones who depend on us every day. The way we see it, setting the pace in the truck industry is all about working together. Whatever your business, a fully integrated, fully capable truck and engine is a must. Year after year. Mile after mile. With the goal of keeping your business running at its best.

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PayStar® combines unmatched strength with unequalled durability to meet any challenge you can throw at it. On-or off-highway, no job is above its pay grade. Wherever you find trucks being called upon to perform above and beyond the call of duty, you’ll find a PayStar leading the way. Harsh conditions and challenging locations are familiar terrain for this truck. From heavy hauling, to construction dumping, to severe weather plowing, PayStar is built to finish strong.

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Thanks to incredible maneuverability and clear sight lines, the International® TranStar® can take you anywhere your business needs to go. With a setback axle and 50-degree wheel cut, TranStar boasts the tightest turning radius in the business. Powered by a N11 or N13 engine, TranStar gets around effortlessly and reliably. When you’re on the job, you’re constantly turning tight corners and navigating streets. That’s why the International® TranStar® offers the shortest BBC in the industry, an incredibly tight turning radius up to 12’ better than any truck in its class. Plus, superior handling and best-in-class view. In short, TranStar offers your business plenty of advantages to help it run at its best.

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