ISB6.7 for School Bus (EPA 2010)


ISB6.7 for School Bus (EPA 2010)Cummins ISB6.7 EPA 2010 delivers superior performance with the lowest cost of operation and maximum uptime to make it best-in-class.  Its High Pressure Common Rail (HPCR) fuel system delivers an optimum balance of performance, emissions control and fuel economy across the entire operating range.  Ratings range from 200-325 hp and a maximum 750 lb-ft of peak torque. Cummins offers both a 220 horsepower (520ft-lb torque) and 250 horsepower (660 lb-ft torque) that are certified at 0.20g NOx without the use of emissions credits.

How did we make these improvements and still meet stringent 2010 emissions standards? With a totally integrated system, that’s how.  Everything from the advanced fuel injection technology, improved cooled EGR subsystem and Cummins VGT™ Turbocharger to the proven Cummins Aftertreatment System that includes Selective Catalytic Reduction (SCR) technology has been engineered and manufactured in-house.   The result is a totally integrated system delivering an engine that provides near-zero emissions without compromising performance.

And that’s just a few of the features the ISB6.7 has to offer.  It is designed to keep your maintenance to a minimum while delivering big results.

All backed by the best customer support in the business.

Considering a Cummins engine purchase? For more information including pricing and additional technical information, please contact your Cummins representative. If you need help finding a representative, the Cummins Sales and Service Locator tool can help.


Cummins PowerSpec is an electronic tool that makes it possible to tailor the operation of Cummins engines in every on-highway application.

Available for: On-Highway, School Bus

See ISB PowerSpec Engine Features


Advertised Horsepower  200-300 hp  149-224 kW 
Peak Torque  520-660 lb-ft  705-895  N•m
Governed Speed  6
Clutch Engagement Torque  400 lb-ft  542 N•m
Number of Cylinders 
Oil System Capacity  3.75 US Gallons  14.2 Liters 
System Weight  1,340 lb  605 kg 
 Engine Dry  1,150 lb  522 kg 
 Aftertreatment System*  190 lb  86 kg 
*Increase over stand muffler and does not include chassis OEM-supplied components

Product Finder Specifications

Certification Level EPA 2010
Power 200 - 300 hp / 149 - 224 kW


Engine Model  Advertised hp (kW)  Peak Torque lb-ft (N•m) @ rpm  Governed Speed 
ISB6.7 300 300 (224)  660 (896) @ 1600  2600 rpm 
ISB6.7 280 280 (209)  660 (896) @ 1600  2600 rpm  
ISB6.7 260  260 (194)  660 (896) @ 1600   2600 rpm  
ISB6.7 250*  250 (187)  660 (896) @ 1600   2600 rpm  
ISB6.7 240  240 (179)  560 (760) @ 1600   2600 rpm  
ISB6.7 220*  220 (164)  520 (706) @ 1600   2600 rpm  
ISB6.7 200  200 (149)  520 (706) @ 1600   2600 rpm  
*These ratings are certified at 0.20g NOx without the use of emissions credits


Maintenance Item  Miles / Kilometers  Hours  Months 
Oil and Filter*  15,000 mi
24,000 km 


Primary Fuel Filter  15,000 mi
24,000 km 


Secondary Fuel Filter  15,000 mi
24,000 km 


Coolant Filter  None*** 



Overhead Adjustment  150,000 mi
241,500 km 



Standard Coolant Change****  60,000 mi
96,000 km 



Coalescing Filter  Every 3rd to 4th Oil Change Interval 
DEF Filter  200,000 mi
320,000 km 
Particulate Filter Cleaning  200,000 mi
320,000 km 

For complete maintenance information, please consult your Owner’s Manual or Operations and Maintenance Manual, available on QuickServe Online.

Brochures Available

Title Bulletin Number Request View  
ReCon DPF For ISB Engines Flyer 5410974 Request View  Download
ReCon DPF For ISB Engines Flyer - French 5410978 Request View  Download
ReCon DPF For ISB Engines Flyer - Spanish 5410977 Request View  Download
School And Shuttle Bus Engines For EPA 2010 Spec Sheet 4971232 View  Download
SmartSaver6 Injector Kit For ISB5.9 And ISB6.7 Engines Flyer 2878929 Request View  Download
SmartSaver6 Injector Kit For ISB5.9 And ISB6.7 Engines Flyer - French 2878936 Request View  Download