Add to Favorite Sellers. Alternator Fits Delco 35SI Improved Design 8600066 Cat Cummins 8700018 19011187. 10459288 10459289 10459330 19011187 19011258. 30007VL 321-758 8600066 8700004. We have a long history of experience in this industry. To assure proper fitment please matchup numbers from your equipment to the reference numbers we provide. Pictures Pictures are NOT always of the exact product. Sometimes an OEM picture may be used or a different color. The purpose of the picture is to provide you with the style and specs of the product. If you aren’t sure if the pulley is included please confirm prior to purchasing. If one of our products is OEM we state it as such in the PART BRAND section of item specifics. If you aren’t sure please ask prior to purchasing. We will replace only one time in that year.