Sportsman Spotlight: John DeFlorian — Powered by Passion and Precision

For nearly five decades, NHRA Mountain Motor Pro Stock standout John DeFlorian has dedicated his life to building and racing the fastest drag cars he can create. Based in Arnold, Mo., the 2025 NHRA Mountain Pro Stock world champion and Team AMSOIL member is known for his technical mastery and decorated racing career.

The Road to an NHRA World Championship

Spend a few minutes with DeFlorian, and it’s clear that drag racing fuels every part of his life — trophies are just icing on the cake.

“Drag racing is my absolute passion, which is what continues to keep me motivated,” said DeFlorian. “Drag racing and building race cars is all I have ever wanted to do.”

And that’s what he has done. DeFlorian’s 2025 NHRA Mountain Motor Pro Stock world championship was the culmination of nearly five decades of perseverance, craftsmanship and belief. From his first runs at Gateway Motorsports Park in 1977 as a 16‑year‑old bracket racer to hoisting the white hat at his home track in St. Louis, DeFlorian’s career followed a path defined by hard work, patience and perseverance.

DeFlorian rose through the ranks while funding his own racing, eventually competing in nitrous Pro Mod and ADRL Pro Nitrous. At the same time, he built race cars for others as foreman at Jerry Haas Race Cars* in Fenton, Mo. The dual role of driver and fabricator made him a respected figure in the St. Louis drag racing community and gave him a deep understanding of chassis setup, race preparation and team dynamics.

A pivotal moment came in 2011 through his relationship with Kevin Bealko and the Black Diamond Motorsports* team. Bealko offered DeFlorian a rare opportunity: to build and own a new car while Black Diamond supplied the drivetrain, with the choice of remaining in Pro Nitrous or stepping into Extreme Pro Stock. After much consideration, DeFlorian chose Pro Stock, encouraged by his wife LiAnn and longtime crew chief Dan Hellmer.

The decision paid off immediately. DeFlorian debuted his Jerry Haas‑built Camaro in 2012 and quickly became a frontrunner, earning No. 1 qualifying positions, his first ADRL victory and setting records — including becoming the first mountain‑motor Pro Stock driver to exceed 180 mph in the eighth mile. The program thrived on teamwork, with data shared freely between DeFlorian and Bealko under a “one team, two cars” philosophy.

When NHRA introduced Mountain Motor Pro Stock as an exhibition class in 2018, DeFlorian again made his mark, recording the fastest runs at the inaugural event. He went on to win multiple races during the class’s early years, steadily building toward a championship.

The 2025 season tested him like few others. Early-season mechanical failures nearly ended his campaign but help from friends and longtime partners, including engine builder Jon Kaase and RAM Clutches,* kept him alive. Once the momentum shifted, DeFlorian surged, winning four races and entering the final event at Gateway with the championship within reach.

Under immense pressure at his home track, DeFlorian delivered when it mattered most, securing the title in front of the community where his racing journey began. After decades of highs and lows, John DeFlorian reached the pinnacle of NHRA Mountain Motor Pro Stock — proof that persistence, people and passion still win championships.

Longevity, Consistency, Reliability

The 2025 NHRA Mountain Motor Pro Stock Championship is one of the defining accomplishments of his career, but DeFlorian has also set multiple world records in both the eighth‑mile and quarter‑mile. A major part of DeFlorian’s success lies in his ability to observe, adjust and perfect small details. Weather, track prep, temperature, humidity — everything affects a run.

After 43 years building race cars, DeFlorian knows every bolt, gasket, cylinder and bearing depends on lubrication that can withstand the violent acceleration and pinpoint precision of Pro Stock racing. He personally built his current Camaro “after hours, weekends and holidays,” obsessing over every inch of it. In a sport where engines operate at extreme limits and consistency can make or break a season, DeFlorian relies on AMSOIL products to deliver the protection and repeatable performance his program demands.

“AMSOIL gives me longevity, consistency and reliability,” said DeFlorian. “Their products never fail.”

With AMSOIL as a partner, one major variable is eliminated. From the brutal heat of a Pro Stock pass to the repetitive stresses of qualifying rounds, AMSOIL lubricants allow DeFlorian to push his 2015 Chevy Camaro to the ragged edge with confidence. Reduced wear, stable oil pressure and predictable performance mean more time focusing on fine‑tuning and less time worrying about what’s happening under the valve covers. DeFlorian can devote his attention to other elements that alter a race: tuning, chassis setup and making the right call at the right moment.

Driven by Passion. Focused on the Future.

Racing’s highs are unmatched, but the lows test character. DeFlorian approaches setbacks with one mindset: learn, correct and return safely for the next event. He is quick to remind new racers that early expectations must be grounded.

“You’ll have more lows than highs,” he admits. “If it’s your passion, stick with it. I’ve been racing 48 years and still have ups and downs. Never give up.”

That mindset has carried him from a wide-eyed 16‑year‑old to a decorated champion. Today, DeFlorian continues to refine, rebuild and race with the same fire he discovered as that teenager. Supported by family and fueled by determination, he remains one of the sport’s most committed competitors. Whether he’s building the next iteration of his Pro Stock machine or chasing a new world record.