Fleece Performance Fuel Primer Sealing Kits

If you're running an aftermarket positive displacement lift pump on your Duramax, a Fleece Performance fuel primer bulb sealing kit will allow you to eliminate the leak-prone primer bulb from your fuel system. The sealing cap includes a 1/8 in. NPT port to feed a low-pressure fuel gauge or cap it off with the included NPT plug.

Note: Fleece kits include two screw options (standard 8-32 and metric M4). Thread in by hand each screw type and use the thread pitch with the best fitment. There is variation amongst the model years, so always test first by hand to verify the thread pitch on your vehicle.