They all seem to start the same way--what if we take parts of this real thing and turn it into this other thing that's never existed? Would it be cool? From our experience, the answer is usually simple: No. In fact, much of the time we have to keep ourselves from laughing. But every once in a while a vehicle comes along that doesn't try to be over the top, doesn't try too hard to grab the spotlight, doesn't overreach its design promise. And is very cool.

"It started last year," says Warren Victor, Toyota's truck-builder extraordinaire. "Right after last year's SEMA show, I suggested Toyota let me do something really big." Translated, that meant Warren wanted to do the biggest and coolest Toyota truck ever built.

(WARNING! DISCLAIMER ALERT! We want to be clear right up front. Toyota wants to make sure we don't accidentally misunderstand what it means when it commissions a special project like this. In fact, it doesn't even want us to use the word "concept" because as anyone who's been to an auto show knows, what's shown as a concept often becomes reality a few years later. As we understand it, this custom project is just a one-off physical expression from a mad scientist. Yeah, right.)

To get the correct proportions, Victor started with the CrewMax front frame to get the interior space he wanted, but knew he needed more than that model's 5-foot bed. He also worried that if he opted for an eight-foot bed, the Tundra would be too gargantuan to be taken seriously. "The goal was to create the anti-SEMA truck--I like the drama of something that's subtle and subdued," says Warren, "especially in a place like Las Vegas where this show is constantly going over the top."

Grafting a rear frame section of a Tundra regular cab with a 6-foot bed, the project CrewMaximus (our pet name) has a wheelbase of almost 160 inches--similar in length to Ford and Dodge shortbed dualies. Wheelwell to wheelwell, the dualie's over eight feet wide and more than seven feet tall. Contributing to this lofty stature are six Michelin Energy 295/60R22.5 commercial-duty tires wrapped around a set of custom eight-lug brushed-aluminum Alcoa wheels. At nine inches wide and over a yard tall, the six tires give the Tundra dualie a medium-duty look, projecting mass and strength. And it doesn't just look strong: The heavy-duty Meritor rear axle has a set of ring and pinions that measure over 13 inches and are rated to haul as much as 25,000 pounds, with an estimated GVW closer to 35,000. Up front, the truck is two-wheel drive, but the upper A-arms have been widened to hold two sets of Bilstein coilover shocks to handle the extra weight from the surprise under the hood.

From the outset builders knew there needed to be something special to motivate a truck of this size and scope. Pickups that play in this arena all have strong diesel engines running in the neighborhood of 300 horsepower and 600 pound-feet of torque because they typically have to deal with enormous loads. Keeping with the standard, Warren chose a Hino Trucks USA high-pressure common-rail turbodiesel 8.0-liter inline-six used in the U.S. and Japan in a wide range of commercial and cargo-moving applications (Toyota owns Hino). Although the rating for the engine output runs a wide spectrum, this particular engine was tuned to make 305 horsepower and 610 pound-feet of torque. But if those numbers aren't to your liking, never fear--we're told with some slight tuning, ratings can climb an extra 200 horsepower and 400 pound-feet and work just fine. Many of those commercial applications also run the same Eaton five-speed manual transmission used here. Additionally, a heavy-duty custom split driveshaft and remote power-steering unit were designed to deal with expected stresses.