David “Heavy D” Sparks (born January 5 1985) is an American custom-vehicle builder, entrepreneur, and show-stealing gearhead who co-created Discovery’s hit Diesel Brothers, turning his DieselSellerz shop outside Salt Lake City into a viral playground for monstrous diesel builds, outrageous giveaways, and meme-worthy beard moments. When he’s not welding turbos or piloting his own helicopter, Sparks straps into the 1,500-hp BroDozer for Monster Jam back-flips, sets oddball world-records, and channels his big-block charisma into philanthropy—proving he can bolt horsepower onto just about anything that moves, whether it’s on wheels, treads, or rotors.
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