SKU: 11456658614

FASS Fuel Systems Drop-In Series Diesel Fuel System 2020-2023 GM (DIFSL5P2001)

Sale price$215.55 Regular price$239.50
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Description

FASS Fuel Systems Drop-In Series Diesel Fuel System 2020-2023 GM (DIFSL5P2001)FASS Fuel Systems Drop In Series Diesel Fuel System 2020 2023 GM (DIFSL5P2001) Fits: 2020 2023 Crew Cab Short Bed L5P Duramax Part No: DIFSL5P2001 The FASS Drop In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the L5P Duramax. Backed by our limited lifetime warranty, the Drop In Series Fuel System protects your L5P Duramax from the issues caused by fuel contamination. Without proper fuel filtration,

FASS Fuel Systems Drop-In Series Diesel Fuel System 2020-2023 GM (DIFSL5P2001)
Fits: 2020-2023 Crew Cab Short Bed L5P Duramax
Part No: DIFSL5P2001 The FASS Drop-In Series Diesel Fuel System was engineered by FASS to be the most effective filtration solution for the L5P Duramax.

Backed by our limited lifetime warranty, the Drop-In Series Fuel System protects your L5P Duramax from the issues caused by fuel contamination. Without proper fuel filtration, modern diesel injection systems are prone to excessive wear, which can cost THOUSANDS!

By removing over 99 percent of the water from your diesel fuel, along with entrained air and debris down to 2 Microns, the Drop-In Series System protects the L5P's injection system from premature failure.

Additionally, by eliminating the contaminants mentioned above, our Drop-In Series System for the L5P Duramax optimizes MPG (results will vary), restores horsepower, and sharpens throttle response.

And if reliability, optimized MPG, restored horsepower, and a sharper throttle response isn't enough, this system can be installed in an hour or less! This is a true plug-and-play system, requiring no cutting, wiring, or additional modifications.

Better still, this system requires ZERO tuning changes! Whether your L5P is stock or modified, our Drop-In Series Systems will not require adjusting tunes or clearing any codes. Our industry-leading water removal capabilities (3rd-party proven to exceed 99 percent) are reinforced by the unique design of our Extreme Water Separator (XWS).

If our XWS reaches capacity, it acts as a dam, shutting down your truck and preventing major destruction of fuel system components.

FASS Drop-In Technology was developed to achieve industry-leading filtration with the simplest possible installation—making our Drop-In Series Systems a true bolt-in upgrade.

If you're mechanically inclined, a Drop-In Series Fuel System can be installed in your driveway in less than an hour! But don't let the easy installation fool you—our Drop-In Series Fuel Systems offer the same world-class filtration as our Titanium Signature Series and Industrial Series lines.

Performance Radius Cuts (PRC) are an advanced machining technique used to improve the flow of fuel through the FASS System by creating smooth-flowing cuts within the aluminum housing.

This prevents the reintroduction of air and vapor back into the fuel and prevents eddy currents from forming within the corner of a 90-degree sharp angle. FASS Drop-In Fuel Systems are the only Fuel Air Separation System that incorporates these exclusive Performance Radius Cuts, lesser competitors commonly use T-Bone and square 90-degree fittings that can limit fuel flow, cause restrictions and reintroduce air back into your fuel.
2020-2023 L5P Duramax Drop-In Series System Features:

  • The only drop-in L5P filtration system that retains full functionality of the water-in-fuel sensor!
  • The only drop-in L5P filtration system with air separation!
  • Increases lubricity of the fuel by up to 10 percent by removing entrained air and air vapor.
  • Extends the life of fuel injection system components.
  • Over 99 percent free and emulsified water separation with our Extreme Water Separator technology.
  • 2 Micron absolute filtration rating.
  • 100 percent drop-In, no additional modifications needed.
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: 11456658614

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4.9 ★★★★★
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Benjamin
Alexandria, US
★★★★★ 4
Chemical Guys Leather Quick Detailer for Car Interiors 32oz
Size: 32 Fl Oz (Pack of 1)
Reliable Quick Cleaner for Leather Interiors I’ve been using the Chemical Guys Leather Quick Detailer on my car’s interior for a while now, and it’s become one of those go-to products I like to keep on hand. As the name suggests, this is designed for quick touch-ups rather than deep cleaning, and for that purpose, it really does the job well. The first thing I noticed is how easy it is to use. A couple of sprays on the leather seats or steering wheel, a quick wipe with a microfiber cloth, and the surface instantly looks cleaner. It removes light dust, dirt, and fingerprints in seconds. Unlike some products I’ve tried in the past, it doesn’t leave behind a slick or greasy feel, which is important when you’re dealing with things like a steering wheel or gear shifter that you’re constantly touching. Instead, the finish is clean, soft, and natural-looking, which is exactly what I want. The scent is another plus. It has a pleasant, subtle leather fragrance that makes the car smell fresh without being overwhelming or chemical-like. I don’t like products that leave behind a strong odor, and this one strikes the right balance. Another strength is its versatility. While it’s marketed as a car interior detailer, I’ve found it works well on other small leather items, like a laptop bag or even a chair at home. Obviously, it’s not a replacement for a full leather conditioner, but for light upkeep it’s nice to have a single product that can handle more than just my car. That said, there are a few things that keep this from being a perfect 5-star product. First, it’s definitely not designed for deep cleaning—if your leather is heavily soiled, stained, or dried out, this won’t be enough. You’d need a dedicated cleaner and conditioner for a full restoration. Second, the spray nozzle can be a bit inconsistent, sometimes giving off more of a stream than a fine mist. It’s not a huge issue, but it can waste product or make application less even if you’re not careful. Lastly, while it makes leather look clean and refreshed, it doesn’t provide as much conditioning as some other products, so if you’re looking for something that really nourishes and protects long term, this is more of a maintenance step than a solution. Overall, though, I’m very satisfied. The Chemical Guys Leather Quick Detailer is perfect for keeping leather looking sharp between major cleanings. It’s fast, effective, and leaves behind a clean finish without unwanted residue. It saves me time and keeps my car interior looking well cared for, which is exactly what I want from a quick detailer. I’d rate it 4 stars—an excellent product for regular maintenance and touch-ups, with just a few small shortcomings that prevent it from being the ultimate all-in-one leather care solution.
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Reviewed in the United States on September 9, 2025
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Rebecca S
Houston, US
★★★★★ 5
The smell is AMAZING!
Size: 16 Fl Oz (Pack of 1)
Our favorite cleaner and the smell is amazing!! Super functional and we use this on our leather couch too! Spray is nice and not too thick or watery. No stickiness or leftover residue. Instructions are clear and we will keep buying, it’s a great size and value for your money. You won’t regret it!
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Reviewed in the United States on January 31, 2026
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scott bradford
Louisville, US
★★★★★ 5
Great leather cleaner
Size: 16 Fl Oz (Pack of 1)
Bought this because I accidentally got some sunscreen stains on my leather interior in my car. Just a quick spray of this and a wipe with a microfiber towel and the stains are gone! Very pleased with the product and would definitely recommend to anyone who is looking for a nice leather cleaner!
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Reviewed in the United States on May 12, 2026
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Amy Y
Fort Morgan, US
★★★★★ 5
Works as advertised and smells good
Size: 16 Fl Oz (Pack of 1)
My daughter and I went to the beach. She didn't put her cover up back on and got sunscreen on the black leather seats. This stuff worked great. Cleaned it off and hopefully protects for anything else headed towards my seats in the future.
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Reviewed in the United States on March 19, 2026
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Tucker the Great
Phoenix, US
★★★★★ 5
This will melt built up dirt in no time.
Size: 16 Fl Oz (Pack of 1)
I bought a 3 bottle set that included the interior cleaner, cloth cleaner and leather cleaner. All three worked really well when I used them. The cloth cleaner lifted and disolved the surface dirt from the the seats and made easier to use a portable wet vac to vacuum the dirt. The interior cleaner did a far superior job on melting built up dirt on the seats, dashboard, steering wheel and other surfaces. The leather cleaner did pretty much the same as the other two and I can see myself buying this again. It dried quickly too
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Reviewed in the United States on May 31, 2026

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