15,000 HP MAMMOTH TRX Stampede!

Hennessey now has over 100 orders for our MAMMOTH 900 & 1000 HP upgrade packages. We have over 30 RAM TRX trucks at our factory right now! Order yours today! RAM’s supercharged Hellcat-powered TRX is an incredible, 702 HP off-road truck straight from the factory. But why stop there? Hennessey is here to answer the call of those who need to go faster. Warranty-guaranteed MAMMOTH 900 and 1000 HP performance upgrades for the RAM TRX are here. MAMMOTH 1000 TRX Vehicle Page: MAMMOTH 900 TRX Vehicle Page: