Heavy D Finally Opens Up About His Split With Diesel Dave

# Heavy D Finally Opens Up About His Split With Diesel Dave

Dave Sparks, known as Heavy D, and Dave Kiley, aka Diesel Dave, built the Diesel Brothers empire, a powerhouse of custom truck builds and television fame on the Discovery Channel. Their show, *Diesel Brothers*, premiered in 2016, showcasing their Utah-based Sparks Motors with wild stunts, pranks, and jaw-dropping vehicles.

However, recent events have shaken their fanbase as Heavy D announced a massive garage sale, selling off millions in assets, only for it to be abruptly halted by a court order. Rumors of a split between the duo swirled, but the truth behind their challenges is far more complex.

The garage sale, initially framed as a strategic move for “big changes,” was revealed to be a desperate attempt to raise cash amid crippling legal battles. A judge intervened, prohibiting Heavy D from transferring property due to unpaid millions in penalties from past lawsuits. Two major legal wars have threatened their empire.

First, in 2016, Utah Physicians for a Healthy Environment sued them for violating the Clean Air Act by removing pollution controls from trucks, a practice known as “rolling coal.” Tests showed their modified trucks emitted up to 36 times more pollution, leading to a guilty verdict for hundreds of violations. Fines and legal fees totaled nearly $2 million.

Simultaneously, Diesel SpA, an Italian fashion giant, sued for trademark infringement over the use of “Diesel” in their branding and merchandise, resulting in a staggering $11.8 million judgment.

Despite assumptions that financial strain would fracture their friendship, the real split was not between Heavy D and Diesel Dave but with the Discovery Channel. In 2023, after years of legal oversight stifling their creativity—episodes were heavily vetted, and one was entirely scrapped over a questionable exhaust modification—Heavy D chose to end the show.

The rebellious spirit of *Diesel Brothers* was lost to legal caution, prompting them to walk away and reclaim their freedom on YouTube, where they could create without constraints.

Their bond, forged over a decade ago at a church event, remains unbroken. Heavy D, shaped by a tough childhood with a father battling a brain tumor, and Diesel Dave, a former missionary, started with a small used car lot and grew into a viral sensation.

Post-show, Heavy D pivoted to clean energy as CEO of Sparks Motors, acquiring rights to the Nikola Badger, an electric-hydrogen truck, ironically shifting from pollution fines to zero-emission innovation. Diesel Dave focuses on mentorship, partnering with technical colleges to inspire future mechanics.

Through over $13 million in legal debts, the Diesel Brothers’ friendship endured. Their empire fell, and the TV show ended, but they’ve evolved into independent paths—Heavy D as a visionary entrepreneur and Diesel Dave as a trades ambassador. The legal fire didn’t burn their brotherhood; it cleared the way for new beginnings, proving their bond is their most enduring build.