Open engine competition was a feature of the old All-Japan Formula 3 series, and has continued in Super Formula Lights, which began in 2020 with the arrival of the current Dallara 320 chassis.
TOM'S, Spiess and Tomei are the engine manufacturers currently represented, although TOM'S only supplies its own cars and the ThreeBond-branded Tomei unit is only used by one of B-Max Racing's Masters Class entries.
