Xtreme jumps back on their PS rock rod, as well as revisit the SubUrban Gorilla tow monster!

A stock ½ ton is transformed into a trick Baja pre-runner at the Denver Truck Fest.

It’s frame mods, cross members, suspension on SubUrban Gorilla turning an ’87 Suburban into a Hummer H1! Step-by-step how to on making a custom C-channel frame,custom fuel cells, transfer cases and more om Xtreme.

Ever want to build and calculate for your own suspension on your rig? Xtreme walks you through it step by step. Spring rate, wheel rate, all the important calculations necessary to order custom shocks for your off-roader is explained.

Ian and Jessi and the crew travel to West Sacramento, California to a trade school where top students in chassis fabrication get the opportunity of a life time: build a competition rock crawler on TV from scratch! See how 21 apprentices band together with the Xtreme 4x4 to build a Formula Toy competition rig they can be really proud of!

One of our more popular builds makes a return, this time for a junkyard transmission build and beefier transfer case. Our budget CJ7 will be a better performer on the rocks after this show. Jessi has honors on the Dana 300, while Professor Johnson debunks the myth of the automatic transmission, by tearing it down and rebuilding it right before your eyes!

An old worn out Land Cruiser gets new life as Ian and Jessi begin project Saggin' Wagon. The project starts with new suspension. And in our event of the week, Ian and Jessi travel to Pomona, California and the Off-Road Expo "a Shangri-La" for off-road enthusiasts. Ian and Jessi pick two unsuspecting guys out of the crowd who drive very different rigs. Both think they're going window shopping, getting ideas and suggestions with the help of our hosts. When in reality, we are helping them build their rigs - in the end, they find out all the parts are FREE!

Ian and Jessi head back to West Sacramento where their Formula Toy rock crawler has been sitting in the lobby of the trade school since their last visit. This time 10 more students join them to plumb, wire, and fire this trick buggy. In the end, there's a special bonus for this team of student-builders, when they get to participate in the Xtreme challenge. On a course set up by W.E.ROCK, they team up to see who is champion of the rocks!

The Ultimate Tow Rig makes a return after Ian and Jessi travel to Southern California to help build the ultimate power plant - the first ever custom twin turbo Duramax diesel engine designed by Gale Banks. We build the motor from the inside out... with high tech components, to the awesome dual blowers that will eventually command over 700 horsepower, and 1000 ft lbs of torque! Later in this episode, Ian and Jessi bring the motor back to Xtreme and drop it between the frame rails of the Gorilla. Also in this episode, they are considered a different "breed" of off roaders - mud boggers! We travel to Monroe, Louisiana for some mud in your eye, ears, nose, throat, grill, cab etc! You get the point.

To manual shift, or not to manual shift? That has been the question on the legitimacy of pulling the manual transmission out of the Cheap Jeep in favor of a rebuild junk yard automatic and transfer case.

No, our customized monster didn't get towed away. Jessi and Ian show you how to install not one, but two winches using the SubUrban Gorilla. One of them is a Warn 16.5ti - as in it can pull 16,500 Ibs. with 7/16th-inch aircraft cable, so it has to be mounted right. Then they fab up the front and rear of the SubUrban Gorilla for its fiberglass bodywork, and a to-be-installed 40 gallon steel gas tank.

Ian and Jessi grab the reciprocating saw and plasma cutter and back half their beat up Toyota FJ60. This trail runner project will get new lockers, axles, and a four link suspension. Plus we'll travel to Columbus, Ohio for the W.E.ROCK Nationals and a look at professional rock crawling through the eyes of the judges!

With the body and frame back from coating, Ian and Jessi wire their SubUrban Gorilla project, including hooking up accessories like all the lights, roof rack. Plus we're off to Indianapolis Raceway Park for a look at some Xtreme drag racing and guys who eat, sleep and breathe diesel! Performance diesel builder Dan Scheid is profiled!

UROC Pro National Champion Shannon Campbell dominates rock crawling competitions and now Ian & Jessi get to build Shannon's next rig. Plus, we'll travel to Las Vegas for the latest and greatest in aftermarket parts and supplies for the offroader at the Off Road Impact Show.

The Toyota FJ60 returns to have the front roll cage constructed as well as adding fuel injection to the motor, plus exhaust, lights, and all the wiring. Then co-host Jessi Combs takes us to the South Dakota Territory Challenge outside Rapid City, where 200 rigs from all over the country come to run the "xtremely" challenging Black Hills.

The desert bandit makes a return to the shop for interior finishing, dash, gauges, wiring and the suspension... all will come together today. Plus, a trip down to South Florida for their legendary swamp buggy races!

It's been a year and a half in the making and today, their ultimate 4x4 Ranger will hit the dirt, after Ian and Jessi plumb and fire the motor. Plus... we head to the Southern California race shop of legendary Off Road Champion Ivan "Ironman" Stewart, where we get a tour and learn the secrets to his 84 career victories!

We're going to recreate a special order vehicle only available to oil companies based in the Middle East. These rigs come from Ford in limited quantities and are the toughest "stock" pick-ups in the world - running the oil fields in Iraq, Saudi Arabia, and Kuwait. And since you can't buy one, we build one. Plus, back in the early 90's, Jeremy McGrath was a rookie in the motocross circles. These days, he's traded his two wheels for four as a fill-in driver for Baldwin Racing. We hit the CORR San Diego track with this Supercross legend, and he gets strapped into a trophy truck for the first time.

You've seen Ian and Jessi build some wide off road buggies... an ultimate tow rig... what's missing? A trailer! 28 foot flatbed goose neck that gets delivered to your door in a box! With living quarters hey will build this monster hauler from scratch... right before your eyes! Plus... see how pro driver Bruce Zeller has sacrificed his way to the top of the rock crawling circuit.

Call it your ultimate off road play toy the Poison Spyder rock rod hits the trail after it gets buttoned up. See Ian and Jessi take it through it's paces as we payoff the Poison Spyder.

Ian and Jessi take a '95 Jeep Cherokee XJ and tear it down, then turn it into a spec class Baja racer. These buggies run Best in the Desert, and SCORE Competitions. This is a great way to get introduced to desert racing! Plus... back down to Naples and Florida Sports Park for the wildest looking "Water Jeeps" you'll ever see!

It started as an '87 Suburban farm truck and has slowly turned into an ultimate off road tow rig. Today the Gorilla hits the road and the trail. Plus, we'll profile Mud Mom Sherie Richardson who is more at home in her mud bogger than she is in her mini van!

Highlights of our best and worst trail experiences, plus unseen footage behind the scenes, along with over two years worth of bloopers and outtakes from moments our hosts would just as soon forget!