Xtreme 4X4 is a half-hour instructional reality-based television show that airs on Spike TV and was originally part of Spike's Powerblock weekend ' a weekend television programming lineup that consists of how-to automotive shows. The show began in 2005 with hosts Ian Johnson and Jessi Combs. Hosts selected from numerous submission videos from all over the country. Coincidentally, both hosts had already been on other automotive programs such as Monster Garage and Overhaulin' on Discovery Channel. Each episode consists of the two hosts building or modifying vehicles in order to convert them into ravenous off-road beasts capable of handling anything that the elements can throw at them. While the focus of the show is in emphasizing the how-to construction of these 4-wheeling machines, the show will also show updates in the off-road racing world across the United States in such competitions as rock crawling, sand drags, desert racing, mud racing, and trial rides.