FASS Fuel Systems Drop-In Series Diesel Fuel System 2017-2023 GM (DIFSL5P1001)
SKU: 6112482647

FASS Fuel Systems Drop-In Series Diesel Fuel System 2017-2023 GM (DIFSL5P1001)

Sale price$215.55 Regular price$239.50
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

FASS Fuel Systems Drop-In Series Diesel Fuel System 2017-2023 GM (DIFSL5P1001)FASS Fuel Systems Drop In Series Diesel Fuel System 2017 2023 GM (DIFSL5P1001) Fits: 2017 2019 Crew Cab Short Bed L5P Duramax Fits: 2017 2023 Crew Cab Long Bed L5P Duramax Part No: DIFSL5P1001 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

FASS Fuel Systems Drop-In Series Diesel Fuel System 2017-2023 GM (DIFSL5P1001)

  • Fits: 2017-2019 Crew Cab Short Bed L5P Duramax
  • Fits: 2017-2023 Crew Cab Long Bed L5P Duramax

Part No: DIFSL5P1001 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. A

dditionally, 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.
2017-2023 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: 6112482647

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.6 ★★★★★
Based on 1667 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Barb
Los Angeles, US
★★★★★ 5
If you need a nice billfold you just found it. Very roomy!
Color: Black
Very nice billfold, made very well, holds lots of cards, just room for everything. Love it, would definitely buy again, even has nice strap if you choose not to carry without your purse..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 30, 2025
E
Verified Purchase
Ella
West Palm Beach, US
★★★★★ 5
Best leather with lower cost
Color: Brown, Color: Brown
Good quality, I've always loved fossil leathers,. Satisfied with the item.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 18, 2025
B
Verified Purchase
Busy bee
Lowell, US
★★★★★ 5
Super cute, well made
Color: Infinite Pink
Just what I was looking for…can’t top the cute pink
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
M
Verified Purchase
Mr. J. Bradley
West Palm Beach, US
★★★★★ 4
The pink is darker than the image portrays
Color: Infinite Pink
The pink color is significantly darker than the image shows. It’s like a dark red rose color in real life, not so much a hot pink like the listing shows
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
S
Verified Purchase
ssthought
Whiting, US
★★★★★ 5
Still A Fossil Fan
Color: Black, Color: Black
I have been a fan of Fossil products for many years. When I needed a new wallet I was happy to have found this style on Amazon. I travel fairly often so I knew that I wanted a leather wallet that had a removeable hand strap, ample card storage, and a zip closure. This wallet was exactly what I was looking for. The strap is sturdy and zipper is really smooth. The inside of the wallet is very roomy, with multiple pockets (my samsung phone fits inside). There are also two zipper sections (one interior and the other exterior). There are also several places for your ID, cards, etc. I have been using this wallet for over a yearit now and I must say that it has held up really well. There are no pulls/ tears in the stiching or issues with the strap and the zippers still work like new. It's a great option to have on those days when you just don't feel like carrying around a handbag. I would definitely buy this item again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 18, 2025

recommand products