If you’re even remotely involved in the diesel world, you’ve heard of it.
The Ultimate Callout Challenge.
Better known as UCC, this event has become one of the most intense, entertaining, and all-around insane diesel events in the country.
And in 2026, FASS Motorsports will be there in full force — along with our sister companies FASS Diesel Fuel Systems and FASS Fabrication.
If you’re planning to attend, make sure you stop by and see us.
What Is the Ultimate Callout Challenge?
The Ultimate Callout Challenge isn’t just another diesel event. It's a tradition, a legacy, and a true test of the most powerful diesel trucks in the country.
Founded in 2016, UCC was built around one idea:
Find the most complete diesel truck — not just the highest horsepower number.
Competitors are pushed to the limit across multiple events, including:
- Dyno competition
- Sled pulling
- Drag racing
This isn’t a one-trick-pony event. It’s about building a truck that can do everything.
And the results are always wild.
More Than Just Competition — UCC Has Something for Everyone
Even if you’re not competing (and let’s be honest, most of us aren’t), UCC is still one of the best diesel events you can attend. Why?
Because it’s a 3-dimensional event that offers something for every diesel enthusiast.
At UCC, you’ll find:
- A massive truck show featuring builds from across the country
- High-horsepower dyno pulls that will leave your ears ringing
- Side-by-side drag racing action
- Brutal sled pull competition
- A huge vendor area packed with top brands in the industry
There’s always something happening.
You won’t be standing around wondering what to do next.
FASS Motorsports Will Be There
We’re excited to be attending Ultimate Callout Challenge 2026 with the full FASS crew.
The FASS Motorsports team will be on site, ready to meet customers, talk trucks, and connect with diesel enthusiasts from all over the country.
Whether you’ve worked with us before or just want to stop by and say hello, we’d love to meet you.
FASS Diesel Fuel Systems & FASS Fabrication
Joining us at UCC will be our sister companies:
- FASS Diesel Fuel Systems
- FASS Fabrication
FASS Diesel Fuel Systems continues to lead the industry in fuel delivery technology, helping protect injection systems and support everything from stock trucks to 2,000+ horsepower builds.
FASS Fabrication brings that same mindset into the world of suspension, accessories, and custom components — building products that are designed to perform and built to last.
Together, all three brands represent a complete approach to diesel performance.
Expect Serious Trucks
UCC is known for bringing out some of the most extreme diesel trucks in existence.
We’re talking:
- Four-digit horsepower builds
- Compound turbo setups the size of small planets
- Custom fabrication everywhere you look
- Trucks that can dyno, drag race, and sled pull — all in the same weekend
It’s the kind of event where “overbuilt” is just the starting point.
Why UCC Is a Must-Attend Event
There are a lot of diesel events out there.
But UCC stands out because it combines:
- Competition
- Show trucks
- Vendors
- Community
Into one massive weekend.
It doesn’t matter if you’re into racing, showing, building, or just learning — you’ll find something to enjoy.
Stop by and See the FASS Team
If you’re heading to Ultimate Callout Challenge 2026, make sure to stop by and see the FASS Motorsports team.
We’ll be there alongside FASS Diesel Fuel Systems and FASS Fabrication, ready to talk trucks, products, and everything diesel.
It’s going to be a huge weekend — and we’re excited to be part of it.
Have questions? We're here to help.
- Phone: 636-429-7020
-
Email: info@fassmotorsports.com
FASS Motorsports
25 Town and Country Drive
Washington, MO 63090
