The Japanese single-seater series has been working on an upgraded version of its current Dallara-built SF19 chassis since the start of the year, having conducted a number of tests in a pair of development cars.
Test drivers Hiroaki Ishiura and Koudai Tsukakoshi have racked up more than 8,000 kilometres testing various innovations aimed at improving the raceability of the cars and reducing the series' carbon footprint.
