 Complete the following phrase:  As Hill left Arrows after 1997 season to race for Jordan, the team contracted Finnish driver Mika Salo to partner Diniz for the 1998 F1 season. The 1998 season marked a new era for Arrows, as the team decided to build its own engines after buying out Brian Harts preparation company. A V10 Arrows T2-F1 was made to power the cars for the team. It proved to be a difficult season, although both cars finished a respectable fourth and sixth at the eventful 