The base chassis for the series is the Dallara SF19, which was unveiled at Suzuka Circuit in October 2017. The SF19 was regulated to weigh 670 kilograms (including driver), and is powered by two-litre single turbo-charged engines from Honda and Toyota. While sharing the same base architecture as the NRE engines used in Super GT GT500 cars, the engines are detuned relative to their GT counterparts. It features a 'push to pass' style overtake system which allows for additional 5 kg/h of fuel flow to be used when active - increasing power.