1975-1986 Chevrolet K10 V8 5.7L 12si High Output Alternator Pulley:V-Belt Pulley This unit comes with a

This unit comes with a smaller pulley in which requires installing a half inch to an inch shorter belt

This is a direct fit high-output alternator for the 1968-1978 GMC K25 5

This is a direct fit high-output alternator for the 2002-2006 GMC Envoy 4

The material has a wide operating temperature range

When Upgrading to a High-Output Alternator

1975-1986 Chevrolet K10 V8 5.7L 12si High Output Alternator Pulley:V-Belt Pulley This unit comes with aFitment: This is a direct fit high output alternator for the 1975 1986 Chevrolet K10 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 selection