1973-1979 Buick Estate Wagon V8 5.7L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley This is a direct fit

This is a direct fit high-output alternator for the 1987 GMC R1500 4

which causes it to spin faster than a larger pulley

See this Blog Article for assistance in finding the correct shorter belt

This is a direct fit high-output alternator for the 1995 Oldsmobile 88 3

1973-1979 Buick Estate Wagon V8 5.7L 12si High Output Alternator Pulley:6-Rib Serpentine Pulley This is a direct fitFitment: This is a direct fit high output alternator for the 1973 1979 Buick Estate Wagon 5. 7L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high output alternator comes with a separate adaptor plug. One side will plug directly into the aftermarket high output alternator, and the other side will plug into the factory plug. NOTE: If you require charging at a certain voltage setpoint, we offer a