NEW WITH BOX DETROIT DIESEL 523 5558 Fuel Injector. This Detroit Diesel fuel injector is a brand new item, still in its original box. It is designed to work with diesel fuel and is compatible with a variety of vehicles. This fuel injector is perfect for anyone who needs to replace a worn-out or damaged injector. It is easy to install and is sure to provide reliable performance for years to come. Order your Detroit Diesel fuel injector today and get back on the road with confidence!