Cummins Inc.
Cummins X15 Efficiency Seriesengine 800

Navistar Extends Diesel Engine Supply with Cummins

Aug. 11, 2020
Cummins Inc.'s medium-duty and heavy-duty engines will continue to power International trucks and IC buses through 2026, and the new X15 Efficiency Series diesel engines will power International HD trucks.

Diesel engine manufacturer Cummins Inc. has gained an extension of its long-term supply deal with truck builder Navistar International Corp., with Cummins named as the preferred supplier of medium-duty and heavy-duty big bore engines for International Trucks and IC Buses in the U.S. and Canada. Financial terms of the arrangement were not provided, but the supply program will continue through "the next two emission cycles," meaning until 2026.

Navistar president – Operations, Phil Christman, said the extension "allows both companies to optimize future research and development investments in existing technologies as well as the flexibility to invest in advanced technologies.”

Cummins is among the foremost suppliers of diesel engines for highway, off-highway, and service vehicles, supplying engines to Daimler Trucks North America, Mack Trucks Inc., and PACCAR Inc. as well as Navistar.

The Cummins B6.7 and L9 engines will continue to be supplied to Navistar for its International MV Series (medium-duty) and HV Series (severe-duty) trucks, as well as Navistar’s IC Bus CE and RE Series school busses.

The newly available Cummins 15-liter, X15 Efficiency Series diesel engines for heavy-duty vehicles —which is compliant with 2021 federal standards, and offers 400-500 hp/298-373 kW; and torque of 1450-1850 lb-ft / 1966 - 2508 N•m — will be offered with the International LT Series (heavy-duty) trucks

"Navistar is a critical partner to Cummins and we believe the International LT Series trucks paired with the Cummins X15 Efficiency Series and Eaton Cummins Endurant HD transmission provides the best fuel economy, improved uptime, and overall TCO for our mutual long haul customers,” according to Srikanth Padmanabhan, president of Cummins' Engine Business.

Federal regulations for diesel emissions have been growing progressively more stringent for decades, with more scheduled tightening set to take place in 2021, 2024, and then again in 2027.

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