BMW Z9 (or Z9 Gran Turismo, Z9 GT) is a four-seat coupe concept car, carbon-fiber skin over an aluminum space frame. It was introduced on September in 1999 at the Frankfurt Auto Show. During the 2000 Paris Auto Show a convertible variant of the Z9 was debuted. It was designed by Chris Bangle, who was promoted to Director of BMW Group Design. Much of the styling found on E63 6 series is derived from the Z9.