4X New Fuel Injector Assembly 3800876 for Cummins B3.3 QSB3.3 Diesel Engine. For Cummins B3.3 QSB3.3 Diesel Engine. Because the warehouse and technical staff need to check the specific information. If you choose other reasons to return, the processing time will be longer. Because we need to consult technical personnel and warehouse personnel, sometimes the response of customer service may not be timely, please wait for a while, we will respond to you as soon as possible. Please do not leave a negative comment without contacting us, as this is not what we want from each other. Thank you for your kind understanding.