 Nevertheless, the Coupe 60 remained a concept car largely because of unjustified development and production costs relative to small sales volume unless accompanied by any export program.Such program was not feasible especially as General Motors, by that time, was developing the larger volume fifth-generation Chevrolet Camaro based on the same Zeta platform shared with the Coupe 60.The luxury-sports theme of The Coupe 60 is emphasised by such features as a racing-derived chassis setup, including rear-diffuser, front-splitter and carbon-fibre spoiler, and 21-inch centre-lock alloy wheels with unique design Kumho high performance semi-slick tyres.