Item Type: Fuel Injection Pump. Engine model : 6BT5.9-C155. Part Number: 3973198 3975927 3976438 3977571. Fitment Type: Direct Replacement. For Cummins 6BT 5.9-C155 Diesel Engine. Please leave us physical address (home or office address) but not P. In Order To Avoid Unnecessary Return please Check The Product Picture And Part Number Carefully To Make Sure It Is The Product You Want. UPS Surepost usually takes 1-6 workdays. UPS Ground usually takes 1-5 workdays. If you don’t receive package over 30 business workdays, please inform us. Duty for International Buyers. We will do our best to offer you satisfied resolutions.