Quick Facts:
- Vehicle: Ram TRX 6×6 “Project Colossus,” a 2021 Ram 1500 TRX converted to six-wheel drive.
- Builder: Desert Power Wagons of Wilmington, North Carolina.
- Power: About 1,000 hp and 925 lb-ft from a National Speed Stage-3 supercharged 6.2-liter V8.
- Driveline: Full-time BorgWarner transfer case with 6WD Auto, High and Low.
- Tires: Six 38×11.50R18 Toyo Open Country R/T tires.
- Mileage: 10,202 miles per the builder’s listing.
- Price: $599,950, listed for sale.
- Best for: Readers weighing a six-wheel-drive pickup build.
5 min read
In This Article
Overview
The Ram TRX 6×6 called Project Colossus shows what a driven third axle adds to a full-size pickup. Desert Power Wagons of Wilmington, North Carolina, presented the truck on October 27, 2026, and lists it for sale at $599,950. The builder started with a 2021 Ram 1500 TRX, stretched it into a six-wheel-drive crew cab and gave it Dodge Power Wagon styling.
Six driven wheels are the point. According to Carscoops, the extra rear wheels connect to the powertrain, unlike those on some other 6×6 projects. A full-time BorgWarner transfer case feeds all three axles. The builder’s listing also names 6WD Auto, 6WD High and 6WD Low ranges.
Short answer: an extra driven axle adds powered traction at the rear, along with more driveline parts to service. However, the listing publishes no trail test, length or weight, so the benefit stays on paper for now.
Below, we cover what the build does, what it costs and what the listing leaves out. It also compares Colossus with an earlier TRX-based 6×6 from Hennessey. If you drive a stock truck, our look at the 2021 Ram TRX shows the starting point.
| Key Fact | Detail |
|---|---|
| Announced | Oct. 27, 2026, by Desert Power Wagons |
| Transmission | TorqueFlite 8HP95 eight-speed automatic |
| Cab and finish | Tisdale Coachworks four-door crew cab in Satin Charcoal Gray |
| Drive modes | Auto, Sport, Snow, Custom, Mud/Sand, Rock, Baja and Tow, plus Valet |
Tires, Winch and Recovery Gear
Colossus rolls on six 38×11.50R18 Toyo Open Country R/T tires, mounted on black Black Rhino BR012 Outback wheels. You buy, rotate and air down six tires instead of four. The listing also names a front WARN VR EVO 12-S winch with a 12,000-pound rating.
A 12,000-pound rating describes only the winch itself. It says nothing about the shackles, straps or anchor points in the pull. Therefore, pick recovery gear with a breaking strength above the load you expect. Add a damper to the line before you spool out. Our winch buying guide covers the winch side.
A basic kit for a winch-equipped full-size truck includes a rope, a soft shackle and a damper. The Bubba Rope Power Stretch Kinetic Recovery Rope (7/8 in x 30 ft, 28,600 lb) covers vehicle-to-vehicle recoveries. Winch pulls call for the Rhino USA Synthetic Soft Shackle (1/2 in x 22 in, 44,050 lb, 2-pack) and the ARB ARB220 Winch Cable Recovery Damper.
Recovery gear for a winch-equipped truck
Bubba Rope BUBBA ROPE 30-FOOT Model 176680RDG Off-Road Power Stretc…
ARB ARB220 Offroad Winch Cable Recovery Damper in Orange and Black …
What a Driven Third Axle Changes on the Ram TRX 6×6
The listing names a Dana 60 rear axle with an electronically locking differential. However, it does not say which of the two rear axles carries it, or which other axles lock. Treat the Dana 60 locker as the only confirmed one.
A driven third axle differs from a tag axle, which carries load but sends no power to the ground. Carscoops points to this difference, since some other 6×6 projects leave the extra wheels disconnected. On a trail, driven wheels add rear traction, while a tag axle adds only carrying capacity. Each driven axle usually adds gearing, weight and driveline parts to service.
Colossus also keeps the TRX drive modes, and the listing adds launch control with launch assist. Nothing in the listing explains how the stock calibration treats the extra axle off-road. Because Colossus is a bespoke build, expect the answer to come from the builder, not from a factory manual.
About 1,000 Horsepower From a Supercharged 6.2-Liter V8
A stock TRX makes 702 horsepower and 650 pound-feet from its supercharged 6.2-liter V8. National Speed’s Stage-3 upgrade lifts Colossus to about 1,000 horsepower and 925 pound-feet, according to the listing. The work includes an NS1 camshaft by Cam Motion plus Brian Tooley Racing valve springs and pushrods. It also covers a ported supercharger snout and upgraded fuel injectors.
National Speed also recalibrated the engine and transmission with HP Tuners software on a DynoJet chassis dynamometer. The eight-speed automatic stays in place. Colossus borrows its styling from the classic Dodge Power Wagon, whose lineage dates to the mid-1940s, according to Carscoops.
Our story on the factory Power Wagon covers the 2027 Cummins diesel. For TRX power without an extra axle, the 2027 Ram TRX returns at 777 horsepower.
Colossus vs. Hennessey Mammoth
Before Colossus, Hennessey Performance built an earlier TRX-based 6×6. In April 2022, Motor1 reported the Mammoth 1000 TRX 6×6 made 1,012 horsepower and 969 pound-feet. Hennessey added an extra driven axle with a lockable differential, then extended the wheelbase and bed.
| Specification | Colossus | Hennessey Mammoth 1000 TRX 6×6 |
|---|---|---|
| Output | About 1,000 hp, 925 lb-ft | 1,012 hp, 969 lb-ft |
| Tires | 38×11.50R18 | 37-inch |
| Production | Bespoke, one listed | 12 planned |
| Length | Not published | 283 inches |
| Price | $599,950 | Above $449,550 (2022) |
The gap is at most roughly $150,000, although Hennessey’s price is a 2022 floor. Both trucks also differ in cab, body and parts. A Hennessey newsroom post from December 2022 says the company continues to offer 6×6 conversions for the Mammoth 1000 TRX. However, the post gives no price.
What This Means for You if You Want a Ram TRX 6×6
At $599,950, Colossus is a showpiece for most readers. Our earlier story on a Jeep Gladiator 6×6 starting at $132,000 shows how widely these builds vary. Use Colossus as a checklist for any six-wheel-drive build you price. Ask for the numbers the listing leaves out: wheelbase, overall length, curb weight, GVWR, payload, axle ratios and which axles lock.
Length and weight matter more on a six-wheel truck than on a stock TRX. Trail turns, garage fit and parking all depend on them. Also ask for a dyno sheet, because the listing quotes “approximately 1,000 horsepower” without a printed result.
Ownership cost is the other gap. Six 38-inch tires, three axles and a 1,000-horsepower engine, for instance, likely add service items compared with a stock TRX. The listing gives no maintenance history beyond 10,202 miles.
Six 38-inch tires also change your air-down routine. VIAIR rates the 450P 12V Portable Air Compressor (45043) for tires up to 42 inches, with a 100% duty cycle at 100 psi. Pair it with the ARB E-Z Deflator Kit (ARB505) and the JACO ElitePro Digital Tire Pressure Gauge at the trailhead.
Air-down gear for big tires
ARB ARB505 Deflator Kit 10-60 PSI Tire Pressure Gauge Rapid Air Dow…
Final Thoughts
Colossus is a fun truck to read about. Its best idea is simple: the extra axle is driven, so all six wheels pull. This choice separates it from a stretched look-alike. The full-time transfer case and rear locker also support it in the listing.
Its trade-offs are also plain. The price is $599,950, and the listing quotes approximate power. Until a builder publishes weights, dimensions and a trail test, treat Colossus as a design statement more than a proven tool.
If you love the idea, start with the checklist above, then put the same questions to any builder. For TRX speed without the extra axle, a factory truck is the safer buy. Either way, you now know what to ask before a six-wheel pickup earns a spot on your shortlist.
FAQ
How much horsepower does the Ram TRX 6×6 Colossus make?
The builder lists about 1,000 horsepower and 925 pound-feet of torque. In contrast, a stock Ram TRX makes 702 horsepower and 650 pound-feet. National Speed’s Stage-3 upgrade accounts for the difference.
Is the extra axle on the Ram TRX 6×6 driven?
Yes. Specifically, the listing describes six driven wheels, a full-time BorgWarner transfer case and 6WD Auto, High and Low ranges. Carscoops also notes the extra wheels connect to the powertrain.
How much does the Ram TRX 6×6 cost?
The builder lists Project Colossus at $599,950 with 10,202 miles. For comparison, Motor1 reported Hennessey priced its 2022 Mammoth 1000 TRX 6×6 above $449,550.
Who built Project Colossus?
Desert Power Wagons of Wilmington, North Carolina, built it on a 2021 Ram 1500 TRX. Tisdale Coachworks supplied the four-door crew cab.
Does anyone else sell a Ram TRX 6×6 conversion?
Hennessey Performance built the Mammoth 1000 TRX 6×6. However, a December 2022 newsroom post says it continues to offer 6×6 conversions. Confirm current availability and pricing with Hennessey before you plan a build.