; HomeHeavy Duty Truck PartsEngines & Engine PartsEngine AssysCaterpillarOtherUsed 2003 CAT C12 (70 PIN) 2KS 8YN 9SM MBL Engine Assy Used 2003 CAT C12 (70 PIN) 2KS 8YN 9SM MBL Engine Assy Unfortunately this part is temporarily unavailable. View other Caterpillar Other Engine Assys