INDIANAPOLIS (March 3, 2015) – Allison Transmission Holdings Inc. (NYSE: ALSN) and Cummins Inc. (NYSE: CMI) today announced that they have received certification from the California Air Resources Board (ARB) to sell the model year 2015 Allison H 40/50 EP™ hybrid propulsion system paired with the Cummins ISB6.7 and ISL9 diesel-electric hybrid engines for transit buses and coaches.

The dual Executive Order (EO) issued by the ARB to both Allison and Cummins allows sales of the Allison H 40/50 EP with the Cummins ISB6.7 or ISL9 diesel-electric hybrid engine, and is valid for 2015 models. The ARB first provided approval in 2014, but the process requires the EO to be reviewed for renewal eligibility on a model year basis.

“We are pleased to remain the first and only hybrid system manufacturer approved for the transit market in California,” said Deborah Gordon, executive director of regulatory issues and hybrid programs for Allison Transmission.

Allison’s H 40/50 EP hybrid propulsion system is used for both straight and articulated transit buses. It has been shown to improve fuel economy up to 25 percent over similar diesel buses. Additionally, its regenerative braking capability can significantly extend the brake change interval by as much as 350 percent.

“Cummins is pleased the hybrid system has received 2015 certification from the ARB as it will provide transit customers another viable solution designed to meet their business needs,” stated Laura Chasse, general manager of North American Bus Business.

The Cummins ISB6.7 and ISL9 diesel-electric hybrid engines feature proven technology designed and developed in-house that is optimized to deliver the efficiency, durability and performance transit bus customers expect. The ISB6.7 diesel-electric hybrid engine is rated at 280 hp (209kW) while the ISL9 diesel-electric hybrid engine is rated at 330 hp (246kW) for the transit bus market.

Since 2003, Allison has delivered over 6,700 hybrid propulsion systems which have accumulated almost 660 million miles, saving nearly 35 million gallons of fuel and preventing 345 metric tons of carbon dioxide from entering the atmosphere.

About Allison Transmission
Allison Transmission (NYSE: ALSN) is the world’s largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and is a leader in hybrid-propulsion systems for city buses. Allison transmissions are used in a variety of applications including refuse, construction, fire, distribution, bus, motorhomes, defense and energy. Founded in 1915, the company is headquartered in Indianapolis, Indiana, USA and employs approximately 2,700 people worldwide. With a market presence in more than 80 countries, Allison has regional headquarters in the Netherlands, China and Brazil with  manufacturing facilities in the U.S., Hungary and India. Allison also has approximately 1,400 independent distributor and dealer locations worldwide. For more information, visit

About Cummins Inc.
Cummins Inc., a global power leader, is a corporation of complementary business units that design, manufacture, distribute and service diesel and natural gas engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems. Headquartered in Columbus, Indiana, (USA) Cummins currently employs approximately 54,600 people worldwide and serves customers in approximately 190 countries and territories through a network of approximately 600 company-owned and independent distributor locations and approximately 7,200 dealer locations. Cummins earned $1.65 billion on sales of $19.2 billion in 2014. Press releases can be found on the Web at or Follow Cummins on Twitter at and on YouTube at