When the series began, all entrants took a conservative approach to their choice of chassis supplier and opted for the established Dallara F302/F303. Alternative chassis have been tested and/or raced on occasions, but for a variety of reasons, they have failed to become established. In the opening round of 2004, a pair of Anglo-Japanese Lola-Dome F106/03 chassis were entered by Coloni Motorsport before the team returned to the Italian F3 Championship. The two chassis builders later parted company, with Lola developing the B05/30 and Dome continuing with the F106. Dome announced its intention to promote its product to Euro Series teams in 2005, though it has not been raced in the series to date. In February 2005, AM-Holzer Rennsport announced its intention to enter a new F3 chassis from the French constructor Mygale – the 05F3. However, Holzer returned to the Dallara F305 by the start of the season.