Mack Trucks Announces Two New Mack® MP®13 Engine Variants that it Expects will be Fully Compliant with CARB 2024 Omnibus Requirements
ANAHEIM, CA (April 29, 2025) – Mack Trucks today announced that it is seeking certification of two new variants of the Mack® MP®13 engine that it expects will meet the California Air Resources Board (CARB) 2024 Omnibus requirements for low nitrogen oxide (NOx) and particulate matter (PM) emissions standards. Mack made the announcement during the Advanced Clean Transportation (ACT) Expo, April 28-May 1, at the Anaheim Convention Center, Anaheim, California.
The regulation requires a 75% reduction in NOx and 50% reduction in PM compared with existing U.S. Environmental Protection Agency (EPA) standards for engines in Class 8 highway trucks for engine model years 2024 through 2026. Once certified, the new MP13 CARB 2024 Omnibus-compliant engines, rated 425 horsepower and 1,750 lb.-ft. of torque or 455 horsepower and 1,850 lb.-ft. of torque, will be available in the recently launched Mack Pioneer™, Mack’s newest Class 8 on-highway vehicle.
“Mack will have a 13-liter engine that will be CARB 2024 Omnibus-compliant once certified, allowing Mack customers in California to have a fuel-efficient and more sustainable diesel engine to meet all of their highway application needs,” said Jonathan Randall, president of Mack Trucks North America. “At the same time that Mack is working to ensure its diesel customers have a durable, reliable highway truck, we also continue to invest and investigate other sustainable solutions, such as battery electric and hydrogen fuel cell power.”
A new 10kW heater was integrated into the EATS, as well as an additional battery box to support it. Both Mack MP13 engine variants feature the following engine-mounted components:
- A 48-volt alternator, required to support the heated exhaust aftertreatment system (EATS) and new battery components
- Specialized engine tuning software to support low NOx requirements
Once certified, the two variants of the Mack MP13 CARB 24-compliant engine will be available to order on Mack Pioneer models as soon as they’ve been certified. Mack expects that the certification process will be completed by the end of 2025. Fleets and owner-operators interested in the engines should contact their local Mack dealer.
CAPTION: Mack Trucks today announced that it is seeking certification of two new variants of the Mack® MP®13 engine that it expects will meet the California Air Resources Board (CARB) 2024 Omnibus requirements for low nitrogen oxide (NOx) and particulate matter (PM) emissions standards. Mack made the announcement during the Advanced Clean Transportation (ACT) Expo, April 28-May 1, at the Anaheim Convention Center, Anaheim, California.
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