Under the hood is a 5.7L Hemi V-8 engine that was installed by the folks at Burnsville Off Road using an AEV installation kit. This engine has an estimated output of 375 horsepower and 375 lb.-ft. of torque. Mods include a custom 2 -inch exhaust with Magnaflow mufflers and an Optima YellowTop battery. The Hemi is mated to a Getrag 238 six-speed manual transmission. This trans sends power to a Rock-Trac 4:1 transfer case. With the Getrag's First gear ratio of 4.23:1 and the rig's axle ratio of 5.38:1, Lower Forty has a darn impressive crawl ratio of 91:1.