LEGO 8457 Power Puller

8457 Power Puller is a motorized TECHNIC set of a 'power' tractor and pulling sled. The tractor pulls a sled that becomes increasingly difficult to pull, mimicking the behavior of real tractors during a tractor pulling event. In addition to the elastic cord that produces this effect, the trailer also has a battery pack to power the motor. The kit includes a total of 20 pistons and instructions for a number of different engine configurations. For example, the tractor may have five engines with four pistons each, or two engines with ten pistons each, and so on. Although the kit only comes with one electric motor, it comes with instructions for adding a second. The model uses a flex system to steer the front wheels, which some find less effective than traditional rod and gear systems.

The set also includes a short VHS video comparing the model to its real-life counterpart. The model is made in the image of the tractors of Fox Team Larsen, a Danish team that LEGO sponsored in 2000, and carries the team's traditional colors. The team wore the LEGO TECHNIC logo when they competed in the 2000 European Championship in Power Pulling, in which they came first in their class (4.5 tons modified).