The 2006 Infiniti G35 is available as a 4-door, 5-seat sedan. Starting at $31,450, the 2006 Infiniti G35 (A5) Sedan is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2006InfinitiG35w/6-Speed Manual Coupe , priced at $ 33,800 , is powered by a 3.5L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway.