After returning in 2004, Speed won two championship titles, with him first winning the Formula Renault 2000 Eurocup and later the Formula Renault 2000 Germany, despite his worsening colitis. His performances resulted in a drive in the inaugural season of GP2 Series for 2005, as number two at iSport International, to Can Artam. Speed was later promoted to the first driver for the team, as he collected five podiums and 12 top 5 finishes in 24 races. He ended the season third place in the drivers' championship standings behind Nico Rosberg and Heikki Kovalainen.
