Hennessey announced plans to build a 6×6 version of Ram’s TRX truck way back in September 2020. In the time since, the looks haven’t changed much, but the powerplant has. Instead of a Hellephant crate motor, the production version of the Hennessey Mammoth 1000 6×6 TRX keeps the standard 6.2-liter Hellcat V8 but boosts output to 1,012 hp, up from 702 hp in the stock truck. It does this via a 2.65-liter supercharger, among a host of other upgrades. The mammoth truck — it’s the biggest Hennessey has ever built, which is saying something — also receives lots of off-road boosts, including locking rear axles, a Bilstein suspension, 20-inch wheels, and 37-inch off-road tires. Upgraded electronic fold out steps make it easier to get in and out of the seven-foot-tall, 23.5-feet-long vehicle, 12 of which will be built each year.
