FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel engine performance and extend the

engine performance and extend the life of your diesel injection system

and FASS Fuel Systems patented air/vapor removal process

this is because your Duramax doesn't come with a factory lift pump like other diesels

a built in water separation filter and FASS Fuel Systems patented air/vapor removal process

2010-2014 Dodge Cummins 6

FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel engine performance and extend theFASS Fuel Systems Diesel Lift Pump 2011 2014 GM Duramax Lml 6. 6L Titanium Signature Series 165Gph (TS C11 165G). A FASS Fuel Systems can be a beneficial upgrade for your GM Duramax LML diesel engine, this is because your Duramax doesn't come with a factory lift pump like other diesels. This requires your CP3 injection pump to pull your fuel under a vacuum, adding additional stress to your CP3 Pump and risk introduce additional air into your fuel.