|The Gen IV™ is Vintage Air’s most powerful and intelligent climate control system. The Gen IV uses an exclusive fully electronic microprocessor control system eliminate cables or vacuum connections. Separate high capacity copper parallel-flow heat coil and aluminum plate and fin cooling coils provide outstanding performance and instant temperature adjustments. This new Chevelle Sure Fit ™ system includes a backlit three-lever control panel that bolts in the stock dash location. Additional features include variable blower speed and dash/floor/defrost blend . Sure Fit Systems are engineered specifically for each vehicle application and require absolutely minimal alteration to the vehicle for installation.