3686961 Injector Sleeve Kit for Cummins ISX15 QSX15 X15 Diesel Engine single Cam. Part Number: 3686961 3686883 3687210. Product name: Injector Sleeve Kit. Cummins ISX single Cam. Cummins ISX15 QSX15 X15 CM2350 Diesel Engine Parts. International Buyers – Please Note. If you need to receive the goods. If you are not satisfied with the item, you can return it, except for any installed parts. Please send item back in original package (new and un-used, accessories included).