Product Description: Cummins Control Parts List#'s (CPL): 593, 690, 727, 730, 762, 763, 767, 817, 857, 858, 971, 1201,1202, 1268, 1277, 1287, 1508, 1509, 1631, 1659, 2021, 2340 & 2414. Serial & CPL#'s Are Found On A Tag Located On The Side Of The Timing Gear Housing And/Or ValveCover. If Tag Is Missing, Check The Top Of The Oil Cooler Housing To See If It Is Stamped There. Serial Number Consist Of 8 Digits.CPL#'s Are 3 Or 4 Digits.