Bus AC Compressor. New AC Compressor for E-Series V8 6.0L truck chassis (2004-2007). Model # 10S19 . Aftermarket # YC2497. Omega 20-21013-AM Piston Replacement 20-21575-AM; Part Interchanges YC2497, 168197, UC2Z19703AA, 20-21575-AM. 8-Grooved Pulley. Remember to replace your filter drier. We sell more than bus air conditioning compressors. Please browse our store for all of your shuttle bus parts needs.