Heavy Duty Diesel Engine & ECM Tuning Services

Leading Truck Tuning Solutions in Canada and the US

Diesel Spec provides high-performance ECM tuning for heavy-duty trucks and agricultural equipment. We specialize in custom diesel tuning, maximizing fuel efficiency, and increasing engine power for major brands, including Cummins, Caterpillar, Detroit, and Paccar. Every calibration is developed on our 2000hp water brake dynamometer to ensure precise, reliable, and measurable results for your engine.

caterpillar

Caterpillar Tuning

To improve the fuel economy and performance of your Caterpillar engine, entrust the work to the Diesel Spec team. We are operating in all Canada and US.
cummins

Cummins Tuning

Cummins engines and engine parts come with many advantages, including better fuel economy, great reliability and good durability. We have everything you need for your truck engine.
detroit

Detroit Tuning

Improve performance and save fuel by letting the Diesel Spec team perform work on your Detroit Diesel engine. The ECM tuning is also our specialty.
isuzu

Isuzu Tuning

Thanks to Diesel Spec’s recognized expertise, your heavy truck’s Isuzu diesel engine will boast higher performance. Unlock your engine's hidden horsepower and discover the high performance on the road.
international maxxforce

International Tuning

New ECM tuning service for International trucks. Diesel Spec provides heavy truck tuning services for various International engine models. Fuel economy, engine with high performance or EGR-DPF-SRC delete.
mercedes

Mercedes Tuning

Diesel Spec provides diesel engine tuning services. We perform heavy truck tuning on a wide range of Mercedes models. Ask us if you need advices for your heavy truck engine.
paccar

Paccar Tuning

Paccar engine tuning now available at Diesel Spec. We perform tuning on this diesel engines. Unlock the horsepowers, unlock the road.

View agriculture tunings

Our Diesel Performance Upgrades & Delete Kits

For off-highway tuning and competition applications, our inventory includes complete EGR delete, DPF delete, and UREA delete kits. These solutions resolve complex emission system restrictions to maintain optimal engine performance and reduce downtime. Beyond software calibration, we supply premium aftermarket diesel truck performance parts, equipping your vehicle with upgraded turbos, heavy-duty exhaust manifolds, and high-performance crank dampers.

Learn more
Turbos
Exhaust Manifolds
Crank Dampers
Intake Manifolds
ECM Tuning

What's ECM Tuning?

With more than 5000 truck tuned each year, Diesel Spec is the North American leader in diesel engine performance.
dsi tuner

EGR - DPF - UREA Delete

Custom tuning available for competition trucks and export trucks using high sulfur fuel.

DISCLAIMER FOR OFF HIGHWAY TUNING

 

EGR Delete is an Off-Highway Tuning service intended solely for closed-course racing and off-highway driving. It may not be street legal in your province or state, and this service cannot be performed on vehicles registered or certified for highway use. Please check your federal, local, and province laws before purchasing.

Follow us on Facebook

Over a million fans!

Find a dealer

More than 400 dealers in North America!

Read the testimonials

Satisfied customers!