FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel 4L Titanium Signature Series 250Gph

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

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

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

FASS 2011-2014 Duramax 6.6L Titanium Signature Series - 165GPH Fuel Filter Fuel Air & Fuel 4L Titanium Signature Series 250GphFASS 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.