The Formula 150 class was developed to keep older equipment viable on the race course. A variety of engines can be raced in the Formula 150 class, ranging from 100 to 158 cubic inches. If you own older equipment, this class can get you out on the race course. If you like to tinker with your engine, Formula 150 allows you to modify smaller engines. Larger model engines are run "stock" (as manufactured), allowing racers with a variety of engines to remain competitive. Formula 150 is raced primarily in the Northwest and Midwestern United States.
