Hennessey’s Mammoth 900 TRX Sends 728 HP To The Rear Wheels

No matter how powerful and fast a vehicle may be from the factory, it will never be enough for the folks from Hennessy Performance. Case in point, the tuner’s 2021 Ram 1500 TRX-based Mammoth 900.


As standard, the 1500 TRX comes outfitted with a 6.2-liter supercharged Hellcat V8 pumping out 702 hp and 650 lb-ft (881 Nm) of torque. Not only does this make the TRX the most powerful pickup of its kind, but it also means the truck can out-accelerate some very impressive sports cars.

Watch Also: YouTuber Hit With 18 Criminal Charges For Wild Off-Roading Videos With Ram 1500 TRX

In tuning the truck Hennessey has equipped it with a lower pulley and upper pulley upgrade, fitted a ported supercharger snout, high-flow fuel injectors, high-flow air induction system and crank-case ventilation system, and tweaked the ECU. On paper, these modifications result in 912 hp and 873 lb-ft (1,184 Nm) of torque at the crank. Translated to the wheels, this results in 728 hp and 679 lb-ft (921 Nm).

For those after even more performance, Hennessey offers a Mammoth 1000 upgrade package that delivers 1,012 hp and 969 lb-ft (1,314 Nm) of torque and sports a new supercharger, stainless steel headers, and a high-flow exhaust, in addition to the upgrades of the Mammoth 900.

As impressive as all that sounds, Hennessey won’t stop there. In fact, it is creating a 6×6 version of the Ram 1500 TRX complete with Mopar’s 7.0-liter Hellephant V8 crate engine tweaked to produce 1,200 hp.


Updated: March 30, 2021 — 2:31 am

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