JLT Air Filter Pre Filter Fits 5x9 Inch 6x9 Inch Filters Black Fuel Delivery~Injection Pumps & Controllers your Duramax uses a dowel

your Duramax uses a dowel pin on the crankshaft to hold the balancer in place

This XDP Fuel Contamination Kit XD517 is built around a remanufactured CP4 pump

The included ball valves are extremely helpful for minimizing coolant loss during filter changes and also provide a shut-off to bypass the system should you ever need it

(1) Fuel Return Line

JLT Air Filter Pre Filter Fits 5x9 Inch 6x9 Inch Filters Black Fuel Delivery~Injection Pumps & Controllers your Duramax uses a dowelThis prefilter specifically Fits our 5 x 9 Inch, 6 x 9 Inch Air Filters. JLT Performance pre filters are a great way to add style and protection to your JLT cold air Intake system. Custom made for us by Outerwears. Outerwears Pre filters are Designed to enhance the efficiency of any performance or exposed Air Filter. The Pre filter is constructed with a proprietary polyester mesh with uniform micron openings, treated with an hydrophobic water