GXOAP-9142 is an overrunning alternator pulley for catalog-listed GM applications. Catalog technical data includes OD1 54.7, OD2 54.7, W 36.7, R 6, ID 17, M M16, CLOCK CW. OEM/cross-reference numbers are listed for Bosch, Zen, Ina, Wai. Alternator references are listed for Bosch, Gm. Review the catalog fitment and reference numbers for compatibility before ordering.