This is the a/c compressor for 1988-1991 Chevrolet Corvette C4 vehicles. This is a used compressor that is in good condition. The pulley is rusty although this will wear off quickly once installed. This part comes as pictured. The pulley spins freely and the bearings are very barely audible.

GM Part # 10077278

Alternate GM Part #'s 10158032 ; 10135601