Other upgrades go from the standard 20-by-10-inch Titanium finish wheels with Pirelli Scorpion Verdes all-season tires to the lighter forged aluminum wheels with three-season Pirelli P-Zero tires.
Hold both feet steady, and then quickly dump the brake.
The front wheels will lift, your helmeted head will snap back, and the 5,300-pound SUV will shoot forward. You will never feel out of control with the traction that a four-wheel-drive vehicle provides.
The reminder that this has a Hellcat engine comes when you step on the gas to cross a highway, and it lurches forward.
Or when you go to pass and grab gobs of power and exceed the speed limit faster than you can check the speedometer.
This is one vehicle where current speed should be displayed digitally in giant letters in front of you.
The speedometer, located in the lower right of the instrument panel with a traditional needle flitting between speeds listed in 10-mph increments, can make it hard to keep speed in check without setting the cruise control.
The 2.5-mile track carved out of the forest has 700 feet of elevation changes to spice up the turns.
The Trackhawk devoured it all and never felt overly heavy or lumbering.
The SUV has new six-piston front Brembo brakes (largest standard front brakes on a Jeep) and four-piston rear Brembos with yellow calipers, which bring the SUV from 60 mph to a stop in 114 feet.