6 0 1993 Cummins 6BT 5.9L Diesel Engine Rear Main Seal P# 3921043 $29.99 USD (USED) 1993 CUMMINS 6BT5.9LDIESEL ENGINE REAR MAIN SEAL, Part# 3921043, Stock# 319635. For more information contact us directly. ConditionUsedPart Number3921043Stock Number319635 MLS Number9786526CategoryEngine Seals Last Updated6/11/2019 LocationRockwood, TN, US Sold ByMachinery and Truck Parts (844) 835-___ SHOWNUMBERCall Seller Email Seller Save More Info