GXOAP-9143 is an overrunning alternator pulley. Catalog technical data includes OD1 63.5, OD2 55, W 40, R 5, ID 17, M M16, CLOCK CW. OEM/cross-reference numbers are listed for Gm, Valeo. Alternator references are listed for Remy. Review the catalog fitment and reference numbers for compatibility before ordering.