Built From a Garage. Driven by Passion.

Radioactive Motorsports, LLC is an ordinary couple, James and Amy Arn, building an extraordinary business and brand - born from a lifelong dream of owning and driving monster trucks. What started in a two-car garage became Lil’ Miss Radioactive — a mini monster truck built from the ground up with passion, persistence, and family at its core.

Today, we share our build, our journey, and our progress with fans while preparing for future shows and the next generation of trucks to come.