FASS 2001-2010 Duramax 6.6L Titanium Signature Series - 100GPH duramax stock plus engine the S400SX4 is engineered to

the S400SX4 is engineered to handle demanding horsepower levels with confidence

This kit is designed to work with factory OE trucks without tuning and modifications

Designed to Match the Look of Our Dual CP3 Pulleys

Direct Replacement

Product Overview

FASS 2001-2010 Duramax 6.6L Titanium Signature Series - 100GPH duramax stock plus engine the S400SX4 is engineered toFASS 2001 2010 Duramax 6. 6L Titanium Signature Series 100GPH FASS Diesel Fuel System 2001 2010 GM Duramax 6. 6L Titanium Signature Series 100Gph (TSC10100G). A FASS Fuel System will be a very beneficial upgrade for your GM Duramax diesel engine, this is because your Duramax doesn't come with a factory lift pump like other diesels. This requires your CP3 CP4 injection pump to pull your fuel under a vacuum, adding additional stress to your CP3 CP4 Pump