X12 (2018) for Motorhomes

Power 455 - 500 hp
339 - 373 kW

Torque 1550 - 1695 lb-ft
2102 - 2298 N•m

Certification

Click Here to Contact Sales

Select an Application

Overview Fire and Emergency Heavy-Duty Truck Truck Equipment Manufacturers and Body Builders Motorhome and RV Engines

Overview:

When it comes to Class A motorhomes, nothing provides more luxury and power than the Cummins X12.

Up to 500 HP and 1700 lb-ft of torque
Compact design for easier access to maintenance points
20% stronger compression braking
Annual maintenance intervals

Advances to the emissions system provides exceptional thermal efficiency, minimizing regeneration and improving fuel efficiency. With the highest power-to-weight ratio of any heady-duty engine, the Cummins X12 is the ideal choice for your luxury Class A motorhome.

Displacement	720 CU IN	11.8 L
Lube Oil Capacity	42 QT	39.8 L
Biodiesel Compatibility	Up to B20
Engine Braking Horsepower	Up to 450 HP @ 2300 RPM
Idle Speed	600-800 RPM
Governed Speed	2000 RPM
Engine Weight (Dry)	2050 LB	930 KG
Aftertreatment Weight*	173-191 LB	78-87 KG

*Depending on configuration

	Advertised HP (kW) @ RPM	Peak Torque LB-FT (N•M) @ RPM
X12 500	500 (373) @ 1900	1695 (2298) @ 1000
X12 455	455 (339) @ 1900	1550 (2101) @ 1000

Support.

Cummins on Every™ Corner – Over 3,700 authorized locations across North America, to support parts and service needs.
Peace of Mind – Base warranty backed by Cummins for a full 5 years/100,000 miles, whichever comes first. Up to 8 years of optional full engine coverage, including injectors.
Cummins Guidanz™ and INLINE™ Mini – Read real time engine data and email fault information from your smart phone to speed up the repair process.
QuickServe™ Online Mobile – Provides complete parts and service information based on specific ESNs.
Easier Maintenance – The compact design of the X12, together with easy service points for scheduled maintenance increases uptime.
Get the Latest – Need more information about the Cummins X12 engine or Cummins Onan generators? Visit the Motorhome & RV section of cummins.com