AFE DFS780 Fuel System (Boost Activated) 17-19 6.6L GM 6.6L Duramax L5P
SKU: 55545868014

AFE DFS780 Fuel System (Boost Activated) 17-19 6.6L GM 6.6L Duramax L5P

Sale price$427.50 Regular price$475.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

AFE DFS780 Fuel System (Boost Activated) 17-19 6.6L GM 6.6L Duramax L5PGrab the AFE DFS780 Fuel System with Boost Activation for your Duramax powered Chevy or GMC and be amazed with the difference between AFE's fuel system vs other aftermarket brands. Four years of testing is what it takes to make a fuel system perfect, and AFE spent the time to make sure that they developed a system that has no rival. Instead of a lengthy and time consuming installation like other brands, the DFS780 installs in just a few hours for

Grab the AFE DFS780 Fuel System with Boost Activation for your Duramax powered Chevy or GMC and be amazed with the difference between AFE's fuel system vs other aftermarket brands. Four years of testing is what it takes to make a fuel system perfect, and AFE spent the time to make sure that they developed a system that has no rival. Instead of a lengthy and time consuming installation like other brands, the DFS780 installs in just a few hours for immediate use. The boost activated model switches on anytime the supplied present boost switch identifies a certain level of boost, meaning the pump is only working when it needs to, extending the overall life of the pump.

It's easy to get caught up in the aftermarket excitement, especially with things that add an instant boost in awesomeness. A bigger-better suspension system, great injectors, roaring exhaust, an air guzzling cold-air intake; these all deliver kick in the pants power gains, and let's face it, are just plain fun. But it is important to remember that adding all these aftermarket parts require you to strike a balance with all aspects of your truck, and a very important aspect is fueling. In fact an upgraded fuel system becomes increasingly more important with each aftermarket item, failure to replace or improve your stock lift pump could leave you high and dry!

The DFS780 removes the remainder of the power-robbing entrained air, water, and contaminants directly stimulating the performance of your Duramax. You'll also notice improved throttle response as well as increased horse power and torque at all RPMs.

Unlike other brands, AFE designed the DFS780 as a single filter system; other brands use two filters, one for the fuel and another to separate water. Instead, AFE integrated clear water separation bowl attached to the high-efficiency fuel filter eliminating the need and expense of replacing two filters. The water separator bowl is reusable and can be emptied easily. AFE recommends changing the DFS780 fuel filter every 10 to 20 thousand miles.

While the DFS780 can definitely be equipped to a completely stock vehicle, you will notice the most gains with an assortment of aftermarket parts that require better fuel and better fueling. Each DFS780 unit is tested at AFE to ensure peak performance, the unit is flowed and rated at a minimum of 2.0gpm (gallons per minute), this rating can support over 2000HP.

Along with added horsepower the DFS780 will also increase the performance of your truck while towing. By proving enough fuel for even the toughest towing situations you'll notice almost no loss of power.

Replacing the fuel filter on your DFS780 is easy and can be replaced with either an AFE or Donaldson filter.

FEATURES:

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

Helical Bronze Spur 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 and tear on the DFS780 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 55545868014

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 2301 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Verified Purchase
Nelson Lopez
Lexington, US
★★★★★ 5
Great bag!
Size: UNIT, Color: Black
Very nice quality leather! Beautiful bag! I used it one day and realized a messenger bag isn’t for me. I found the flap cumbersome to open so I switched to the more traditional Triboro briefcase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2025
J
Verified Purchase
JK
Phoenix, US
★★★★★ 5
Stylish and functional
Size: UNIT, Color: Navy Blazernew British Tan
Works well with a 15" laptop
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 25, 2025
M
Verified Purchase
MARCOS BANDRES
Lexington, US
★★★★★ 5
Excelente
Size: UNIT, Color: Navy Blazernew British Tan
Excelente bolso super practico
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2025
B
Verified Purchase
B. Lewis
Chelsea, US
★★★★★ 2
Barebones
Size: UNIT, Color: Navy Blazernew British Tan
Wanted to love it but for the price had next to no compartments for storage. There are better option that are less expensive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2025
S
Verified Purchase
Steven M.
Fort Morgan, US
★★★★★ 5
Ready for the “Wild Elegamce “ ball!
Color: Red, Size: X-Large, Color: Red, Size: X-Large
It runs a little small so even though I usually wear a large, the extra large is good for me as recommended by other buyers. It’s going to be perfect for iur “Wild Elegamce” fundraiser ball in October!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026

recommand products