The 2008 Gran Turismo D1 Grand Prix series was the eighth season for the D1 Grand Prix series and the third for the D1 Street Legal spinoff series. The US series was proposed for a second season in November 2007, but in February 2008, due to commitments, the series was cancelled, leaving the 2007 as the only year the US series ever took place, despite being exhibition rounds. The series began March 29, 2008 for the D1SL and March 30 for D1GP at Ebisu Circuit. The series ended with a non-point scoring World All-Star event held at Irwindale Speedway on November 30, 2008 and concluded altogether on December 14 as a D1SL point scoring round.