CATERPILLAR C13 ACERT, (GOOD USED) OEM Caterpillar C13 ACERT Diesel Engine Rocker Arm, KCB, for sale!!!! (EACH ROCKER SOLD INDIVIDUALLY!!!!!) Part #: 241- 0372; Stock #: R1057 For more information about this listing, shipping, technical questions email us at sales@jjrebuilders.