TKP0008 is an A/C compressor for the Kenworth T660, T800, model years 2008 to 2012.
It replaces 58 OEM and aftermarket numbers, among them 4377, 1457X, 4080. Searching any one of them will find this part.
On compressors the clutch pulley diameter, its groove count and the coil voltage all have to match, along with the port configuration on the head.