FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel this is because your Duramax

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

eliminating all cutting of the filler neck

Rated at 165 gallons per hour and backed by our 1 million mile/5 year warranty the Titanium Signature Series lift pump is capable of supporting a semi diesel engine with enough fuel with multiple fueling system upgrades

2010-2014 Dodge Cummins 6

4L Titanium Signature Series 250Gph (TS F16 250G)

FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel this is because your DuramaxFASS 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.