The GST 7.7 has evolved from its orgin "Genesis" into one of the worlds most durable monster trucks from years of bashing and racing on the roughest terrain. The GST is meant to be raced or bashed. This beast is 30 percent larger than a Traxxas Revo 3.3. At the same time, it includes many unique features no other truck does: It has a 7.7 engine, three speed transmission, reverse module, digital radio system and much more.