X12 engine

X12 (2021) for Heavy-Duty Truck

Power 350 - 500 hp
261 - 373 kW
Torque 1250 - 1700 lb-ft
1695 - 2305 N•m
Certification EPA 2021

Available Regions

US and Canada,  Russia,  Africa & Middle East,  Mexico,  Philippines,  Singapore,  Brazil,  Bolivia,  Uruguay,  Paraguay,  Argentina,  Colombia,  Central America,  Europe,  Korea,  Japan

Overview:

The X12 engine is an optimal choice for vocational and regional haul truck fleets that need maximum payload without compromising performance capability. Vocational customers with the EPA 2021 X12 will be especially pleased with the option to reduce engine noise both in operation and at idle through an air compression resonator. Plus, vocational ratings maintain a governed engine speed of 2000 RPM, which optimizes driving performance while allowing for greater flexibility in axle ratio and transmission selections. From soft surface to highway speeds, the X12 provides the performance needed to get the job done. 

In regional haul trucks, the 2021 X12 can be paired with the Endurant™ HD™ automated manual transmission from Eaton Cummins Automated Transmission Technologies. With this pairing comes the option for EX ratings, which offer features* like On-Ramp Boost, Predictive Gear Shifting, Predictive Engine Braking and Dynamic Power. Watch this short video to learn more about these features. Keeping efficiency in mind, the 1800 RPM governed speeds along with an optimized shift calibration with the Endurant HD means the X12 offers excellent fuel economy without sacrificing driving characteristics.  

Regardless of application, all 2021 X12 On-highway truck customers will have the option for a longer fuel filter, which allows for an extended fuel filter interval that matches the 75,000-mile (120,000 Km) market-leading oil drain interval. 

*Require Endurant HD transmission and GPS look-ahead data 

NOTE: For all engines and options available, horsepower may be limited by the truck OEM

REPTO - Available - Torque limit of 466 lb-ft continuous, 516 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 hp

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

Efficiency Ratings

Recommended for line/regional haul applications

 

Engine Model 

Max. Power HP (kW) 

 

Peak Torque lb-ft (Nm) @ RPM 

Governed Speed (RPM) 

Market* 

X12 455ST 

455 (339) 

 

1550/1700 (2101/2305) @ 1000 

1800 

X12 455EX 

455 (339) 

 

1700 (2305) @ 1000  

1800 

X12 455 

455 (339) 

 

1700 (2305) @ 1000  

1800 

X12 430 

430 (321) 

 

1650 (2237) @ 1000 

1800 

X12 430 

430 (321) 

 

1550 (2101) @ 1000 

1800 

X12 410ST 

410 (306) 

 

1450/1650 (1966/2237) @ 1000 

1800 

X12 410 

410 (306) 

 

1650 (2237) @ 1000 

1800 

X12 410 

410 (306) 

 

1450 (1966) @ 1000 

2000 

X12 410 

410 (306) 

 

1450 (1966) @ 1000 

1800 

X12 400ST 

400 (298) 

 

1550/1700 (2101/2305) @ 1000 

1800 

X12 400EX 

400 (298) 

 

1650 (2237) @ 1000 

1800 

X12 380 

380 (283) 

 

1450 (1966) @ 1000 

1800 

X12 380EX 

380 (283) 

 

1450 (1966) @ 1000 

1800 

X12 370 

370 (276) 

 

1350 (1830) @ 1000 

1800 

X12 350 

350 (261) 

 

1350 (1830) @ 1000 

1800 

* H=Line / regional haul   V=Vocational   R=Refuse

 

Productivity Ratings

recommended for vocational and refuse applications

 

Engine Model 

Max. Power HP (kW) 

Peak Torque lb-ft (Nm) @ RPM 

Governed Speed (RPM) 

Market* 

X12 500 

500 (373) 

1700 (2305) @ 1000 

2000 

X12 475 

475 (354) 

1700 (2305) @ 1000 

2000 

X12 455 

455 (339) 

1700 (2305) @ 1000 

2000 

X12 455 

455 (339) 

1550 (2101) @ 1000 

2000 

X12 430 

430 (321) 

1650 (2237) @ 1000 

2000 

X12 430 

430 (321) 

1550 (2101) @ 1000 

2000 

X12 380 

380 (283) 

1450 (1966) @ 1000 

2000 

V / R 

X12 370 

370 (276) 

1350 (1830) @ 1000 

2000 

X12 365 

365 (272) 

1250 (1695) @ 900 

2100 

V / R 

X12 350 

350 (261) 

1450 (1966) @ 1000 

2000 

V / R 

X12 350 

350 (261) 

1350 (1830) @ 1000 

2000 

V / R 

* H=Line / regional haul   V=Vocational   R=Refuse 

Fixed X12 Intervals

 

Item

Miles

DEF

300,000 Mi

Valvetrain

300,000 Mi

Crankcase Breather

N/A

HC Doser

N/A

 

X12 Maintenance Intervals by Fuel Consumption

 

Item

Vocational

Severe

3-4.9 mpg

Shorthaul

5.0 - 5.9 mpg

Normal

6.0 - 6.9 mpg

Light

> 7.0 mpg

Oil Drain*

1500 hrs. / 18 months

40,000 Mi

64,000 Km

50,000 Mi

80,000 Km

60,000 Mi

97,000 Km

75,000 Mi

120,000 Km

Oil Drain with Valvoline PB

1500 hrs. / 18 months

45,000 Mi

72,000 Km

55,000 Mi

89,000 Km

65,000 Mi

105,000 Km

80,000 Mi

130,000 Km

Oil Drain with OilGuard™

Extensions avail

Extensions avail

Extensions avail

Extensions avail

Up to 100,000 Mi

Up to 160,000 Km

Fuel Filter*

1500 hrs.

30,000 Mi

48,000 Km

40,000 Mi

64,000 Km

50,000 Mi

80,000 Km

60,000 Mi

97,000 Km

Fuel Filter Extensions¹

---

40,000 Mi

64,000 Km

50,000 Mi

80,000 Km

60,000 Mi

97,000 Km

75,000 Mi

120,000 Km

DPF Ash Maintenance***

12,000 - 16,000 hrs.

300,000 - 400,000 Mi

480,000 - 640,000 Km

300,000 - 400,000 Mi

480,000 - 640,000 Km

400,000 - 600,000 Mi

640,000 - 960,000 Km

600,000 - 800,000 mi

960,000 - 1,300,000 Km

*If combined percent idle time plus power takeoff (PTO) time is greater than 40% for Shorthaul, Normal, or Light intervals, use the next lower drain interval. Less than 3 MPG ODI and Fuel Filter at 4,500 miles
¹A remote mounted fuel filter is recommended to achieve these intervals
***Cummins recommends using Cummins Remanufactured DPF at the DPF ash maintenance interval.  Users can experience extended DPF ash maintenance using the DPF maintenance fault lamp (FC5383) 
 



To access our complete brochure library, click here.
Redirecting to
cummins.com

The information you are looking for is on
cummins.com

We are launching that site for you now.

Thank you.