In the race to be biggest & baddest, Hennessey just upped the ante with the introduction of the Goliath 6X6. Limited to 24 units, this 6-wheel monstrosity is based on the 2019/2020 Chevrolet Silverado and churns out a mud-spraying & speedboat-towing 450 horsepower. It got an 8-inch lift, sits on 20-inch wheels, and shines with a raft of top-end off-road mods.