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Description
AFE 42-14021 DFS780 Fuel System (Full-Time Operation)The AFE 42 14021 DFS780 Fuel System with Full Time Operation for your 2011 2016 GM 6. 6L Duramax LML offers you a complete fuel system solution for your Duramax pickup. The fuel in your truck contains contaminants, water and air vapor which reduces power and can cause damage to your injectors. The AFE DFS780 Fuel System features a patent pending design capable of removing power robbing entrained air, water and contaminants. The DFS780 ensures constant
The AFE 42-14021 DFS780 Fuel System with Full-Time Operation for your 2011-2016 GM 6.6L Duramax LML offers you a complete fuel system solution for your Duramax pickup. The fuel in your truck contains contaminants, water and air/vapor which reduces power and can cause damage to your injectors. The AFE DFS780 Fuel System features a patent-pending design capable of removing power-robbing entrained air, water and contaminants. The DFS780 ensures constant availability for your CP3 injection pump, while improving throttle response and horsepower at all RPMs.
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.
Horsepower & Flow:
The DFS780 can be used on a totally stock truck, it was engineered for modified vehicles. BSFC (Brake Specific Fuel Consumption) for most modern turbocharged diesel engines is about 0.36 lbs/HP/hr. Since #2 diesel weighs about 7 pounds/gallon, which gives us about 19.5 HP/gallon/hr. The DFS780 will flow enough fuel (at rated pressure) to support over 2000 HP.
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.
Relay Controlled:
The DFS780 is powered by your ignition and can be run independently or in parallel with the stock fuel 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 Seals:
Compatible with diesel and biodiesel fuels.
Features:
- 8-10 PSI
- Built In The U.S.A.
- Supports 2000+ HP
- Full-Time Operation
- C.A.R.B. OE# D-550-37
- "Worry Free" 2 Year Warranty
WARRANTY INFO:
2 Year
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.8 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 4
It is a good sunscreen, but if your skin is very oily, think again.
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
I have tried many, MANY sunscreens, and this one is in my top 10, but not at the very top. Why not? Well, what I like about it is that you get a good amount for an excellent price. It's lightweight, but not extremely so, and this size can easily last you 3 months without any problem. However, while it's made for oily skin, it's not that light. After just a few hours of application, it can leave your skin feeling greasy, especially if you sweat easily. It doesn't leave a white cast, but it does leave a slight, shiny finish. Reapplying isn't very comfortable. If you use it just once a day, it's fine, but if you apply it more often, your skin will feel a bit heavy and oily. I think this sunscreen is better for specific occasions rather than for daily use. If I had to choose a sunscreen for daily use, I would pick one with a lighter formula, like Fusion Water from Isdin.
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Reviewed in the United States on September 11, 2025
★★★★★ 5
Very good sunscreen
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
I love this, it’s very light weight, no white cast and not very oily. Love it
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Reviewed in the United States on May 17, 2026
★★★★★ 5
stellar sunscreen for face- sensitive skin friendly, feels good not greasy on, timeless
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
I used to try out different brands and this is the one I've got to have for my face- safe on sensitive skin and just feels really nice and not greasy putting on, sometimes I get stuck borrowing so now I get a few and have them in various places. Also, I appreciate they don't change the packaging or add other versions so I can grab and always feels great and works on
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Works great but does not hold up to sweat
Size: 3 Fl Oz (Pack of 1), Style: SPF 50
Dissolves with intense exercise then burns eyes and makes a mess, but otherwise works great.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
An old favourite & reliable.
Size: 7 Fl Oz (Pack of 2), Style: SPF 70 (Pack of 2)
Im very sensitive to the sun and Coppertone always works.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
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