For the 2019 model year, Peterbilts spec’d with the 12.9-liter engine will have the option of a multi-torque, 455 HP engine with a torque rating of 1,650 to 1,850 lb.-ft. and 405 HP with 1,650 lb.-ft. of torque.
Peterbilt’s On-Highway Marketing Manager Wesley Slavin says when packaged with the Paccar Transmission and the Paccar 40k rear axle, the new 405 HP and 1,650 lb.-ft. torque rating for the MX-13 is one of most fuel efficient integrated powertrains for long haul customers.
“Peterbilt and Paccar Powertrain work closely to ensure Peterbilt customers have the most fuel efficient options available, and they already benefit from a total weight savings of more than 500 lbs. when spec’ing the full PACCAR Powertrain on the Model 579,” he says.
The new engine ratings will be available in January.