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Cummins Diesel

Select Engine   | ISX | ISM | ISL | ISC | ISB |

ISM Designed for long-distance cruising up and down the interstate. With the highest power-to-weight ratio in its class, the ISM 450 and 500 horsepower ratings let you climb every mountain.

When you're ready to make the move up in size, the ISM is your engine, with custom recreational vehicle ratings ranging from 450 to 500 hp and up to 1550 lb-ft of peak torque. Our patented Variable Geometry Turbocharger (VG Turbo) adds performance at every rpm. For extra braking power, we offer the C Brake™ by Jacobs®*, an engine brake specifically designed for the ISM.

Maintenance is minimized, while fuel economy is maximized. So you spend less time in the garage, make fewer stops at the fuel pump and save money every mile. And every ISM is backed by the most extensive customer support network in the industry. With programs like Coach Care™ and Power Assist to meet your service needs as you travel across North America in your motorhome.




ISL Our most popular engine in the motorhome market. Flatten those hills with ratings from 350 to 400 horsepower. 

The ISL is one of the fastest-growing engines in popularity among diesel motorhome owners because it delivers outstanding performance. . The ISL is equipped with a Holset Variable Geometry Turbocharger (VG Turbo) and a High-Pressure Common-Rail (HPCR) fuel system that make it more responsive and significantly quieter than previous models (up to 50% quieter than the previous model). With ratings of up to 400 horsepower and 1200 lb-ft of "hill-flattening" torque, the ISL delivers exceptional performance accelerating away from a stop light, pulling a tow vehicle down the highway or climbing every upgrade. The ISL also has increased engine braking capability (over 330 braking horsepower with the optional C Brake™ by Jacobs®*), for greater control on every downgrade.




ISC With 330 horsepower and 950 lb-ft of torque, the ISC will get you where you need to go in a hurry. Plus, it's up to 50% quieter than previous models.

The ISC's robust design has created a legacy as the most popular engine used in diesel pusher motorhomes. It has the outstanding fuel economy every diesel motorhome owner demands, and the ISC's minimal scheduled maintenance results in a low cost of ownership. The introduction of a new High-Pressure Common-Rail (HPCR) fuel system gives added performance at the 330-horsepower rating, and additional heavy-duty design features give the ISC enhanced reliability. An optional exhaust brake gives up to 205 hp of stopping power.





ISB An electronic fuel system and a Variable Geometry Turbocharger make the 325-hp ISB up to 80% quieter than its predecessor. It also runs cleaner and faster with better fuel economy and your choice of 600 or 660 lb-ft of torque.

We've taken our proven B Series platform (over 3 million in operation worldwide), added a cooled-EGR subsystem and a Variable Geometry Turbocharger by Holset (on ratings of 245 hp and above), and improved every aspect of operation and braking. Fuel economy is up to 2% better. Engine performance is stronger, yet there's 80% less noise along with exceptional reliability. And with all these enhancements, maintenance is kept to an absolute minimum. The ISB offers a choice of ratings options.



ISX Dual overhead cams, an integrated engine brake, and up to 600 horsepower. Ultra-luxury motorhome owners take note. With dual overhead cams and a patented Variable Geometry Turbocharger, the ISX has the highest horsepower ratings and best performance available in the entire RV industry. An integrated engine brake, or Intebrake™, generates over 600 braking horsepower, so you can glide down almost every mountain without touching the brake pedal.

Ask any owner, and they'll tell you that ISX reliability is second to none. Every ISX is covered by a full 5-year, 100,000-mile (160,935 km) standard warranty, and backed by the most extensive customer support network in the industry. With programs like Coach Care™ and Power Assist to meet your service needs as you travel across North America in your motorhome.

And here's something every motorhome owner can appreciate: Maintenance has been kept to an absolute minimum. For more details, check out the Cummins ISX on our QuickTime video.

For Cummins-branded merchandise, electronic tools, literature and more, visit our PowerStore web site.



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