2021 Ram TRX – Fast X Movie Truck | SMP Fab Build

This 2021 Ram TRX is a one-of-one, no-expense-spared build created by SMP Fab for Fast X and featured on screen alongside John Cena. Beyond its cinematic presence, it was also showcased at the King Shocks booth at SEMA, where MotorTrend recognized it as the best TRX. While its Hollywood pedigree is undeniable, this truck was engineered first and foremost to perform. Every major system was designed, fabricated, tested, and refined for sustained high-speed desert use, with build costs exceeding the upper $300,000 range and well over $100,000 invested in suspension alone.

The chassis has been extensively gusseted and plated, with additional smoothing and reinforcement throughout the front and rear frame sections to increase both strength and finish quality. Fitment across the entire vehicle is exceptional, reflecting thousands of fabrication hours and multiple months of engineering and tuning.

-Suspension & Chassis

Rear Suspension: True Kibbetech four-link short-course setup with 55” billet links, delivering nearly 24 inches of rear travel
3.0 x 18 King IBP coilovers built to proprietary Kibbetech specifications
Fully trussed semi-floater rear end
Custom fabricated bump stop system

Front Suspension: Long-travel J-arm system designed in CAD by Nate Hansen
Kibbetech tie rods
12” front coilovers and bypass shocks (not 10”)
Just under 18 inches of strapped front travel

Extensive engine cage fabrication by Marvin Lotterlie of Penhall Fabrication
Professionally tested and tuned at Barstow by Fabian at King Shocks
Rock-solid stability at 80+ mph in desert conditions

-Body & Fabrication

Custom hand-formed steel fenders by Brian Stone
One-off front fenders with paint protection film
Carbon fiber hood
Nearly 100 hours invested in the custom front bumper alone
Radiator and cooling system relocated and integrated for improved approach angle
Lighting mounted behind the grille on a reinforced internal structure
Rear bed cage and rack system with under-bed fuel cell protected by a Kibbetech skid plate

-Exhaust & Drivetrain

Fully custom exhaust system (over $10,000), plumbed through a highly reinforced section of the frame for durability and clearance
System delivers exceptional sound without compromising structural integrity

-Wheels, Tires & Lighting

Inovate wheels
40” BFGoodrich KR3 tires
Extensive Baja Designs lighting package
This TRX represents the rare intersection of Hollywood-level presentation and true desert-race engineering. Built to withstand extreme abuse while maintaining exceptional stability, finish, and presence, it stands as one of the most comprehensively engineered and visually striking TRX builds ever produced.