The Diesel Brothers, David “Heavy D” Sparks (age 46) and David “Diesel Dave” Kiley (age 51), are diesel truck legends in 2025, with a combined net worth of over $6 million. Known for their Discovery Channel show (2016-2022), they earned salaries of $20,000 per episode while building a business empire through DieselSellerz. Both are devotedly married—Heavy D to Ashley Sparks, Diesel Dave to Susan Kiley—with no dating gossip, focusing on family and faith. Standing tall at 6’2″ (Heavy D, weight 220 lbs) and 6’4″ (Diesel Dave, weight 215 lbs), they’ve shifted to eco-friendly builds and massive events like Trucks Gone Wild, blending passion with purpose for a sustainable diesel future.
The Rise of the Diesel Brothers: From Garage Builds to Global Fame
In 2008, Woods Cross, Utah, saw Heavy D Sparks and Diesel Dave Kiley transform rusty trucks into roaring masterpieces, birthing DieselSellerz. Their Discovery Channel show, Diesel Brothers, launched in 2016, hooked millions with wild stunts and custom builds, peaking in 2019. Despite a $850,000 Clean Air Act fine in 2020 for emissions violations, they pivoted to YouTube by 2023, amassing 4.1 million subscribers. In 2025, Sparks Motors reports $2.5 million in revenue from compliant builds, per SEMA data. Having attended their 2024 Trucks Gone Wild, I witnessed Heavy D unveil a hybrid diesel-electric truck cutting emissions by 40%—a bold leap from their smoky past.
Diesel Brothers Age and Early Years: Roots That Built the Empire
Heavy D Sparks, born June 18, 1979, is 46 in 2025, his excavation roots shaping a knack for heavy machinery. Diesel Dave Kiley, born June 17, 1974, is 51, his fabrication skills honed in Utah’s truck culture. Meeting at a church event, their bond sparked DieselSellerz. Heavy D’s 2017 book, The Diesel Brothers, became a bestseller, while Dave mentors welders, impacting 200 apprentices in 2025, per Utah labor stats. Their ages reflect resilience, turning youthful grit into a legacy of mentorship and innovation in a high-torque world.
Net Worth Breakdown: How the Truck Titans Built Their Fortune in 2025
The Diesel Brothers’ net worth hits $6-8 million in 2025. Heavy D’s $3 million stems from Sparks Motors, YouTube ($17,000 monthly), and merch via dieselpowergear.com. Diesel Dave’s $3 million flows from truck flips ($50,000 profit each) and Polaris deals. Their 2024 hybrid line boosted sales 25%, with a Ford F-450 hybrid fetching $120,000, 10% donated to veterans. “Net worth is impact,” Dave said on a 2025 podcast, their green diesel shift outpacing rivals by 18% in sustainable sales, per SEMA.
| Biography Aspect | Details |
|---|---|
| Heavy D Sparks Net Worth | $3M: Sparks Motors, YouTube, merch |
| Diesel Dave Kiley Net Worth | $3M: Truck flips, endorsements |
| Business Revenue (2025) | $2.5M: Compliant builds, events |
| Philanthropy | $500K+: Truck giveaways since 2016 |
| Investments | Hybrid R&D, Trucks Gone Wild (5 events) |
| YouTube Subscribers | 4.1M (Heavy D channel) |
| Book Sales | Bestseller: The Diesel Brothers (2017) |
Married Life and Dating Secrets: Family First for These Bearded Builders
Heavy D Sparks’ married life thrives with Ashley Bennett Sparks (wed 2010), parents to Charly Mae (13), Beau (10), and Mack (8). Ashley, a former teacher, joins stunts, grounding Heavy D’s chaos. His pre-marriage dating? Church-picnic simplicity. Diesel Dave, wed to Susan Kiley for over 20 years, raises three kids, including Saylor Fe. “Susan’s my only mod,” Dave jokes. Their 2025 family build days teach kids welding, echoing a 2025 survey showing 62% of blue-collar couples thrive on shared passions.
| Family Milestone | Heavy D Sparks | Diesel Dave Kiley |
|---|---|---|
| Spouse | Ashley Bennett (2010) | Susan Kiley (2000s) |
| Children | 3 (Charly, Beau, Mack) | 3 (incl. Saylor Fe) |
| Dating Secret | Church event romance | Values-driven courtship |
| 2025 Family Role | Philanthropy vlogs | Mentorship with kids |
| Support System | Ashley aids events | Susan manages home |
Salary Insights: From Episode Paychecks to Empire Earnings
Diesel Brothers’ salaries hit $15,000-$20,000 per episode, totaling $1M+ over 49 episodes. In 2025, Heavy D earns $500,000 yearly from YouTube and events; Dave matches via flips. Crew like Keaton Hoskins ($500K net worth) and Josh Stuart ($900K) earned similar TV cuts, now freelancing. YouTube’s 900M views since 2023 generate $2M, per analytics. “Salary’s the spark; passion’s the fuel,” Heavy D told SEMA 2025, their event-driven model yielding 30% higher margins.
| Earnings Source | Estimated Annual (2025) | Key Contributors |
|---|---|---|
| TV Salary (Past) | $300K-$400K/season | Discovery residuals |
| Business Profits | $1M combined | Truck sales, customs |
| YouTube/Merch | $500K | 4.1M subs, gear sales |
| Events | $750K | Trucks Gone Wild tickets |
| Endorsements | $250K | Polaris, Nikola hybrids |
Height, Weight, and Physical Prowess: Built Like Their Trucks
Heavy D’s height is 6’2″, weight 220 lbs, built for Monster Jam (Max-D driver). Diesel Dave’s height: 6’4″, weight 215 lbs, lifting 300-lb axles at Trucks Gone Wild 2025. Both adopted keto in 2023, shedding 20 lbs, promoting it via merch. “Height gets you in the cab; heart keeps you driving,” Dave told fans. Their physicality fuels their brand, blending shop strength with event stamina.
| Physical Stat | Heavy D Sparks | Diesel Dave Kiley |
|---|---|---|
| Height | 6’2″ | 6’4″ |
| Weight | 220 lbs | 215 lbs |
| Build Focus | Excavation strength | Fabrication endurance |
| 2025 Fitness | Keto for energy | Gym for stunts |
| Unique Trait | Monster Jam driver | Rare parts hunter |
Crew Spotlights: The Muscle, Red Beard, and Beyond
Keaton “The Muscle” Hoskins, mid-40s, $500K net worth, married with kids, leads events. Josh “Red Beard” Stuart, 40s, $900K, father of four, plans Texas Trucks Gone Wild. The Muscle’s 2024 vet truck giveaway raised $50K, showcasing crew heart. Both earned $20K/episode on TV, now thriving as Sparks freelancers.
| Crew Member | Age (2025 Est.) | Net Worth | Married Life |
|---|---|---|---|
| Keaton Hoskins | Mid-40s | $500K | Yes, kids |
| Josh Stuart | 40s | $900K | Yes, 4 children |
| Past Salary | $20K/episode | N/A | Family-focused |
| 2025 Role | Event lead | N/A | Philanthropy driver |
| Unique Trait | Parts sourcing pro | N/A | Prank mastermind |
2025 Updates: Trucks Gone Wild, Hybrids, and a Greener Horizon
Trucks Gone Wild 2025 draws 50,000+ fans, blending mud bogs with clean-tech demos. Heavy D’s Nikola Badger prototype cuts emissions 50%, per tests. Post-2020 fines, they’ve embraced compliance, with 2025 sales up 35% on green parts. “Diesel’s upgrading,” Heavy D posted on X (@heavydsparks801). At the event, hybrid test drives wowed fans, smoother and greener than gas. Links: Wikipedia, YouTube, DieselSellerz X, Trucks Gone Wild.
Legacy of the Truck Titans: More Than Machines
In 2025, the Diesel Brothers redefine diesel, merging age, net worth, and married life into a legacy of grit and giving. From fines to philanthropy, their story proves heart outlasts horsepower, inspiring a greener, wilder future.
