Ram 2500 Diesel AC Compressor Clutch Assembly Replacement for Mopar 05183899AA A/C Complete AC compressor clutch Assembly This Clutch will fit your Original (OEM) compressor. It will NOT fit after-market units. Make sure your compressor is the Original (OEM) Halla HS18 Compressor. The Clutch includes all parts needed to replace your old clutch. (Pulley Front Plate and Coil) The front plate is UPGRADE quality, design with Steel Springs not rubber bumpers.