Applications: Freightliner 108SD 6.7L 2012-2013 Freightliner 108SD 8.3L 2012-2013 Western Star 4700SB 12.8L 2013-2018 Western Star 4700SB 8.3L 2012-2013 Western Star 4700SB 8.9L 2013-2018 Western Star 4700SB 9.0L 2018-2018 Western Star 4700SF 12.8L 2013-2018 Western Star 4700SF 8.3L 2013-2014 Western Star 4700SF 8.9L 2012-2018 Western Star 4700SF 9.0L 2018-2018 Pay Attention: The three main parts of the compressor clutch assembly are the coil magnet, the pulley, and the clutch plate. The clutch drive plate is splined to the input shaft of the compressor. .