Cummins B6.

7™
for motorhomes
You deserve a diesel. One with proven reliability and performance. Cummins
B6.7 fits that description, and features improved fuel economy and extended
maintenance intervals. Plus, it’s a prime example of American ingenuity as it’s
designed in Indiana and built in North Carolina.

PERFORMANCE
• Quiet responsiveness: Cummins VGT® Turbo and High Pressure
Common Rail (HPCR) fuel system provide exceptional throttle response
at every rpm.
• Torque where you drive: Cummins B6.7 has maximum torque over a
wide operating range to minimize downshifting.
• Proven performance: Over 12 million B Series engines have been sold in
the last 35-plus years.
• Optimized emissions control: Cummins Single Module™ aftertreatment
system has exceptional thermal efficiency and meets the latest
emissions requirements.

COST OF OPERATION
• Improved fuel economy: Improved aftertreatment and engine
controls result in greater efficiency and fewer regenerations.
• Reduced maintenance: Up to 18 month fluid and filter changes with a
maintenance free crankcase breather
• Full vehicle integration: Each OEM installation undergoes rigorous
testing to optimize dependability.
 SUPPORT B6.7 RATINGS
• Peace of mind: With a standard Governed Peak torque
Maximum
5-year/100,000-mile base warranty and Engine speed LB-FT (N•M)
HP (kW)
(RPM) @ RPM
optional full engine and aftertreatment
B6.7 360 360 (269) 2,600 800 (1085) @ 1,800
coverages for up to eight years, we’ve got
B6.7 340 340 (254) 2,600 700 (949) @ 1,600
you covered.
B5.6 325 325 (242) 2,600 750 (1017) @ 1,800
• Cummins on every corner: Over 3,700 B6.7 300 300 (224) 2,600 660 (895) @ 1,600
authorized locations across North America to B6.7 280 280 (209) 2,600 660 (895) @ 1,600
support parts and service needs B6.7 260 260 (194) 2,400 660 (895) @ 1,600

• One source for service: Your local

Cummins Sales and Service location B6.7 TYPICAL MAINTENANCE INTERVALS
supports both Cummins engines and
Cummins Onan generators.
Maintenance item Miles/Kilometers* Months*
• World-class support: Call 1-800-CUMMINS
(1-800-343-7357) for answers to your Oil and filter 20,000 mi/32,000 km 18
questions and support for your service needs. Fuel filter 60,000 mi/97,000 km 18
Valve lash check 150,000 mi/240,000 km —
• Cummins Guidanz™ and INLINE Mini: Allow
Crankcase
you to read check engine lights and share via Maintenance free
breather filter
email with your service provider
* Whichever occurs first. Consult your chassis and engine
Owners Manuals for more information.
POWERING YOUR DRIVE AND
YOUR RELAXATION B6.7 SPECIFICATIONS
Cummins covers all your power needs by also Configuration Inline 6
offering a range of generators for the RV market. Displacement 408 cu in/6.7 L
Lube oil capacity 17.6-20.8 qt/16.7-19.7 L
Idle speed 700-900 rpm
Optional compression brake Up to 182 hp @ 3200 rpm
No load governed speed 2,800 rpm
Engine weight (dry) 1,150 lb/522 kg
Aftertreatment weight 125-167 lb/57-76 kg
Biodiesel compatibility Up to B20
Maximum overspeed 4,200 rpm

MORE TORQUE WHERE YOU DRIVE FOR 2021 GET THE LATEST INFORMATION
Torque Visit rv.cummins.com to learn more about
Horsepower
825 375 Cummins B6.7 engines and Onan generators.
800 350
Horsepower (hp)
Torque (lb-ft)

775 325
750 300
Cummins Inc.
725 275 Box 3005
700 250 Columbus, IN 47202-3005
U.S.A.
675 225
cummins.com
650 200
1600 1 800 2000 2200 2400 2600 Bulletin 5410643 Produced in U.S.A. Rev. 3/25
©2025 Cummins Inc.
Engine Speed (rpm)

5410643_flyer_us letter.indd 2 02/04/25 22:17