
PRODUCT Detail
The two things that matter most in a fire or emergency vehicle are response time and reliability. So we built the 2007 ISL with superior performance and exceptional dependability. And in the process, we also made it run cleaner.
How did we make these improvements and still meet stringent emissions controls? The ISL is designed as a totally integrated system that includes our proven cooled-EGR subsystem, a High Pressure Common Rail fuel injection system, patented VG Turbo, Cummins Particulate Filter and a crankcase ventilation system. Add the optional compression brake, and it even stops better with more than 330 braking hp.
And that’s just the start of all the features the ISL has to help your fire and emergency vehicles get ready to roll on a moment’s notice, every time.
The ISL is also designed to keep your budget from going up in smoke, with long maintenance intervals and excellent fuel economy. Ratings range from 345-425 hp.
The superior performance of the ISL comes from a constant flow of high-pressure fuel, injected with precise timing for optimum burn efficiency. An increased number of injection events per cycle results in an ISL that runs stronger and more efficiently than ever before.
Advertised Horsepower | 345-425 hp | 257-317 kW |
Peak Torque | 1150-1250 lb-ft | 1559-1695 N•m |
Governed Speed | 2100-2200 rpm | |
Clutch Engagement Torque | 550 lb-ft | 746 N•m |
Number of Cylinders | 6 | |
Oil System Capacity | 7.3 U.S. gallons | 27.6 liters |
System Weight | 1,760 lb | 798 kg |
Engine (Dry) | 1,678 lb | 761 kg |
Aftertreatment* | 50 lb | 22 kg |
*Increase over standard muffler
- Enhanced High Pressure Common Rail Fuel System – Delivers optimum balance of performance, emissions control and fuel economy across the entire operating range.
- Full-Authority Electronic Controls – Higher microprocessor capacity and speed for optimum control of the engine and aftertreatment.
- Cooled Exhaust Gas Recirculation – Lowers combustion temperatures for reduced emissions and optimized mpg.
- Variable Geometry Turbocharger – Enhanced response and control with electric actuation for infinite adjustment, providing exact boost across the operating range. Sliding-nozzle design increases reliability, durability.
- Cummins Particulate Filter – Fully integrated for uncompromising performance, reliability. Reduces particulate matter 90%.
- Crankcase Ventilation System – coalescing filter only needs replacement every 3rd to 4th oil change.
- Low Maintenance – Long oil change intervals maintained. Cummins Particulate Filter will go 200,000-400,000 miles (320,000-640,000 km) in a typical duty cycle for most vehicles before it needs cleaning.
- Heavy-Duty Features – Replaceable wet liners, roller followers, two-piece steel articulated pistons, by-pass oil filtration, and targeted piston cooling.

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