
PRODUCT Detail
600 lbs Lighter in 2018? The Weight is Worth It.
At 2050 lbs, the X12 is especially designed for weight-sensitive applications. Up to 600 lbs lighter than other medium-bore engines and 150 lbs lighter than the next lightest engine in its class.
What can you carry with 600 more lbs?
- 30 more cases of soda in your delivery truck
- 97 more gallons of fuel in your tanker
- 10 more bushels of corn in your grain hauler
Productivity has a new liter. 12.
Weight reduction is only important if the engine can also get the job done efficiently, day in and day out. The X12 was designed to be a left lane truck with right lane fuel economy. It has the performance and transient response that impresses even the big bore truck drivers while maximizing fuel economy in regional haul and local duty cycles.
- Up to 500 HP and 1700 lb-ft of torque
- Revolutionary low-friction design for higher MPG
- Maintenance intervals that rival the X15 with longer Oil Drains and DPF maintenance beyond the first owner
- Compatible with a broad choice of transmissions: fully automatic, AMT and manual
Don’t Just Take Our Word For It
We are field testing this engine across North America with our customers in a wide range of vehicles and job types.
Hear from everyone getting real-world experience now:
Lots of power.” – Refuse, 54K lb typical GVW (Alaska)
I think this little motor does you guys proud… It’s a beast.” – Heavy Hauler, 115K-135K lb typical GVW (Canada)
Once in top gear, the X12 pulls better than 15L upgrades. Does not downshift as often and later in the hill… keeps on pulling.” – Regional Hauler, 80K lb typical GVW (Midwest)
The engine is strong and smooth, very responsive and I can tell it has lots of power.” – Dump Truck, 46K lb typical payload (Arizona)
NOTE: For all engines and options available, horsepower may be limited by the truck OEM
REPTO – Available – Torque limit of 466 lb-ft continuous516 lb-ft intermittently, gear drive ratio is 1.18:1, rotation is opposite of the crankshaft
FEPTO – Available – Torque limit up to 625 lb-ft
Advertised Horsepower | 350-500 | 261-373 KW |
Peak Torque | 1250-1700 lb-ft | 1695-2305 N•m |
Governed Speed | 2000 rpm | |
Clutch Engagement Torque | 800 lb-ft | 1085 N•m |
Number of Cylinders | 6 | |
System Weight | 2,241 lb | 1,017 kg |
Engine (Dry) | 2,050 lb | 930 kg |
Aftertreatment System* | 191 lb | 87 kg |

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