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 that eliminates 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.Complete kits include everything in the evaporator kit, plus all under-hood components such as compressor, engine brackets, condenser with brackets, preformed refrigerant lines, drier, fittings, hardware and installation instructions.