The TCI® StreetFighter® Transmission for Chevy engine applications is tough enough to withstand the rigors of the toughest street machines - up to 725 horsepower with a non-supercharged system using pump gasoline. Equipped with a TCI® manual/automatic valve body, most units allow you to manually shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. This gives you racetrack shifts and shaves time off your ETs.