FASS Duramax Filter Delete DFD-4000

After a FASS fuel air separation system goes on a Duramax, the factory fuel filter isn't doing anything useful. The DFD-4000 screws on in place of the stock filter. Per FASS, that gets rid of the time and cost of changing the stock filter every 5-10K miles, lets fuel flow without the restriction, and gives you a gauge port to watch fuel pressure.

FASS lists it for 2001-2016 GMC/Chevrolet. FASS is also clear that this has to be used with another form of fuel filtration, like a Titanium FASS system. Don't run it on a truck with only factory filtration. If you're not sure about your setup, call us.

Why we like it

• Screws on in place of the stock filter (per FASS)
• No more stock filter changes every 5-10K miles (per FASS)
• Gauge port for monitoring fuel pressure (per FASS)
• Fits 2001-2016 GM Duramax (per FASS)

Fitment: 2001-2016 GM Duramax (with aftermarket filtration). Choose your exact application from the options; each option is a specific FASS part number.

Questions on fitment? Call the shop at (806) 503-2161.

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Questions? Call (806) 503-2161 (Mon-Fri 8am-5pm CT) or email blackdiamondultd@gmail.com.