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To recap, the Mammoth is based on a 2021 Dodge Ram TRX that has been punched up to deliver even more power and presence. Under the chest-height hood, the existing 717 hp, supercharged Hellcat V-8 has been swapped for a 7.0-liter Hellephant engine tuned to churn out a massive 1,026 hp. Similarly, the torque has jumped from 650 ft lbs to 969 ft lbs to help propel the monster truck forward.
Beyond performance upgrades, Hennessey extended the base by an extra 4 feet and added a third axle to accommodate the additional two wheels. Dwarfing regular pickups, the finished Mammoth is almost 24 feet long, 7 feet high and 7.3 feet wide. The truck is also equipped with an off-road kit, including a locking rear axle, Bilstein suspension and thick 37-inch tires covering 20-inch rims.
