Acdelco 15-2439 A/C Compressor Clutch Pulley For GM V5 Compressor, 5'' Diameter

ACDELCO 15-2439. Condition: New - Other.
Interchange: 6552077; 1131729
Fits 1987 Oldsmobile Calais; 1988-1991 Buick Skylark; 1988-1991 Oldsmobile Cutlass Calais; 1988-1991 Pontiac Grand Am
this is ONLY for the 5.0'' diameter, there is a different number for the 4.90'' diameter one. Will NOT WORK ON THE 4.9''.