I'm looking for a

Single Tune

I have a


I'm interested in becoming a


Choose your engine brand to get started

Commercial trucks, on- or off-highway, industrial, agricultural or custom builds — we're the experts to help you get it done right.

Mario High Performance Diesel is the authority in custom diesel tuning

Brought to you by The Beast —
Mario's 4000hp CAT-powered 1988 Peterbilt 379. Building the truck with recycled Caterpillar parts, the truck holds the World Speed Record for NHRDA Semi Hot Rod Class at 120.35mph.

See More At MarioMonette.com

Located in Edmonton, Alberta with a vast dealer network throughout the United States and Canada

Why Mario High Performance Diesel

Real programmers write and create custom tunes

Battle-tested reliability

MHPD tunes operate with unparalleled uptime and help your engine last longer by mapping to spec and staying within your engine's limits. Last longer, tow stronger with an MHPD custom tune.

Cutting-edge optimization

Individual, custom decoding for every tune — no program-merging, swap-overs, or cheap auto calibrations. Mario and his team attend global conferences to stay on top of the latest industry shifts.

Minimal downtime

We schedule jobs to ensure minimal downtime for your truck. Whether remote or in-shop, we'll ensure that your truck is tuned exactly how to you want it with most turnarounds times within same-day service.

Top-notch customer support

Available toll-free daily, MHPD customer service ensures all customers receive follow-up support when they need it. Bring us questions about previous defective programming. We're here to help.

Tuning & Diagnostics Options

As one of the leading diesel tuners in the world, Mario Monette & MHPD create new, custom tunes built from scratch to fit each customer's specific application. From torque and power boosts to emissions solutions and anything you can dream up.

Our Partners

We're proud to work with industry-leading partners who work hard every day to push the diesel industry forward.

Mario's Upcoming Races

Mario doesn't have any races scheduled right now. Check back for updates.

Talk to a tech

There's no better time than right now to start saving money. We're here to answer your questions.