DFS780 Lift Pump

The diesel fuel in your truck contains contaminants dirt, water and air/vapor which is reducing power and damaging your diesel fuel injectors. aFe's POWER DFS780 Diesel Fuel System, with its patent-pending design, is capable of removing power-robbing debris such as air, water and other contaminants. The DFS780 also boosts fuel pressure ensuring constant availability for the high-pressure pump, improving throttle response and horsepower at all RPMs.

Additional Information

DFS780 Fuel Pump (Full-time Operation) GM Diesel Trucks 11-16 V8-6.6L (td) LML

Product Overview

*Built-in Bypass For Stock Fuel System:*
Allows vehicle to run on stock fuel pump under light loads, reducing wear & tear on both the DFS780 and the stock high-pressure pump.

*Clear High-Impact Polycarbonate Sight Glass:*
Allows visual inspection of fuel.

*Helical Bronze Spur Gears:*
Bronze gears more forgiving of contaminants than steel gears. The Helical spur gear design runs quieter than straight cut gears.

*Billet 6061-T6 Aluminum Manifold:*
Eliminates porosity concerns with cast aluminum.

*"Marine Grade" Motor:*
Protected against dust intrusion and powerful water jets.

*Plug & Play Installation:*
Supplied harness attaches directly to battery and utilizes Deutsch weather-proof connectors. No cutting or modifications of the stock fuel lines required. Vehicle can easily be returned to stock.

*Boost Activated Pump Engagement:*
Supplied preset boost switch activates pump only under load, reducing wear & tear on both the DFS780 and the stock lift pump.

*PEEK Bearing Wear Surfaces:*
The DFS780 spur gears ride on PEEK (Polyether Ether Ketone) bearing surfaces to reduce both noise and wear.

*Contoured CNC Machining Of Manifold Passages:*
Enhances flow through the manifold to reduce pressure drop due to flow restrictions.

*Direct Bolt-on Steel Mounting Bracket:*
Heavy duty bracket mounts to the frame and utilizes existing hole to secure.

*Fuel Pressure Gauge Port:*
1/8” NPT port allows customer to attach an external pressure gauge to monitor fuel pressure.

*O.E Quality Viton Seals:*
Compatible with diesel and biodiesel fuels.

Note: This system is not currently CARB exempt and is not available for sale in California or for use on any vehicle registered with the California Department of Motor Vehicle.

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Built In The U.S.A.
• Clear High Impact Polycarbonate Sight Glass
• Contoured CNC Manifold Enhances Flow
• Fuel Pressure Gauge Port
• Helical Spur Gears Runs Quieter That Straight Cut Gears
• Marine Grade Motor Protects Against Dust And Water
• OE Quality Viton Seals
• Typical Install Is 2 Hours

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Fuel Pumps, DFS 780, Full Time, Lift, Electric External, 8-10 psi, 12 V, Chevrolet, GMC, 6.6L Diesel, Kit

aFe DFS 780 fuel pumps are powered by your stock ignition and can be run independently or in parallel with the factory fuel pump. They feature helical bronze spur gears that are more forgiving of contaminants than steel gears and they run quieter than normal straight-cut gears. The billet aluminum manifold holds the fuel pump and houses the clear high-impact polycarbonate sight glass for visual inspection of fuel. These fuel pumps are supplied with a plug-and-play wiring harness with Deutsch weather-proof connectors; no cutting or modification is required for installation. High-quality Viton® seals are used, making them compatible with both diesel and biodiesel fuels.