These regulations are applicable to 1/32 scale entry-level models of mixed GT cars. The formula is designed a starting point for the novice or club racer to become accustomed to DiSCA GT racing using mostly standard specification model cars and equipment, with some scope for performance enhancing modifications.
In 2021, GT4 regs were split into Open, Clubman Carrera, and Clubman Scalextric variants. Open GT4 caters for cross brand racing and recognises SCX and Policar as eligible manufacturers when racing in-line GT cars within this performance bracket. The Clubman rulesets employ tighter governance towards scope for modifications and cater for more box-stock racing by clubs or individuals using the standard digital systems and standard digital cars manufactured by these brands.