In 2006 , Taniguchi drove the HKS Speed Source RX - 8 in the Grand Am Cup race at Arizona 's Phoenix International Raceway .
In 2006 , Taniguchi set the fasted qualifying time for any Mazda RX - 8 .
In 2006 , Taniguchi drove the HKS Speed Source RX - 8 in the Grand Am Cup race at Arizona 's Phoenix International Raceway and set the fasted qualifying time for any Mazda RX - 8 .