A great visit to the Audrain Auto Museum to see the GM Concept Car Exhibit. Generously loaned to the Audrain from the General Motors Heritage Center in Warren, MI and the Lingenfelter Collection in Brighton, MI, many of these cars have not been seen together by the public, and never has this number of GM concepts ever been shown in a curated museum exhibition. Many of the design and engineering features seen in these concept cars were revolutionary developments applied to production models in following years. Developments like the rain-sensing convertible top on the Le Sabre and turbine engine powered Firebird III were well ahead of their time, and demonstrated to the public that of which GM was capable.