The Clutch listed includes all parts needed to replace your old clutch; a. PULLEY with HD long lasting NSK BEARING pressed-in the pulley. b. FRONT PLATE. c. ELECTROMAGNETIC COIL with OE connector for perfect fit. d. All HARDWARE needed. e. Step by Step DIY Instructions. The clutch is an external unit and has nothing to do with the refrigerant.With some mechanical skills, you can do it yourself even if the access to the compressor is tight.