The new federal emissions standards are here to stay, with every new Spartan, Ferrara, KME, and E‑ONE order built around them. Here is what’s new, why it still delivers the performance you count on, and how Safetek Profire will support you.
Last updated June 25, 2026
Our manufacturing partners put together a clear walkthrough of the new engines and what is changing. Start here, then use the questions below to learn more.
Video · Manufacturer Overview 2027 EPA Engine ChangesBeginning in 2027, the EPA requires a major reduction in nitrogen oxide (NOx) emissions from diesel engines among the most stringent standards ever set. Meeting them takes more than a tune‑up: engines and their aftertreatment systems have been redesigned from the ground up. The result is a cleaner truck.
| Today’s engine | 2027 replacement |
|---|---|
| B6.7 | B7.2 |
| L9 | X10 |
| X12 | X10 |
| X15 | Updated X15 |
The new X10 effectively covers both the current L9 and X12. The X15 stays in the lineup with a significant redesign. Horsepower and torque are expected to stay comparable to today’s engines.
Key technology updates
Manufacturers — including Spartan and E‑ONE — are working closely with Cummins to fold these systems in while protecting cab layout, compartmentation, and how the truck functions on scene. A few practical effects to plan for:
Power and torque comparable to today’s engines, with cleaner emissions.
Larger aftertreatment and added electrical components may affect packaging in the chassis.
More sophisticated systems mean new diagnostic and service procedures — which we’ll be trained on.
Every department’s needs are different. Reach out and we’ll help you build your next truck on the new platform — and answer any questions about the 2027 engines along the way.
Information summarized from materials provided by our manufacturing partners and Cummins and is subject to change as the 2027 transition develops. For the most current details on your specific apparatus, please contact Safetek Profire.