Fuel Filter Housing

Features:

• Fits 2017–2019 Duramax and 2020–2024 long bed trucks
• Replaces factory cartridge-style fuel filter
• Includes Donaldson 4-micron spin-on filter
• Increases fuel filter capacity and lifespan
• Billet aluminum base with gray anodized finish
• Maintains flow across PTC heating element
• Quick disconnect fittings for easy installation
• No tuning or modifications required
• 1/8" NPT port for pressure monitoring
• Engraved WCFab logo on filter base
• Replaces multiple GM part numbers

High-Quality Fuel Filter Housing by Wehrli

If you’re running a 2017–2019 short bed or a 2020–2024 long bed Duramax and you’re ready to ditch the stock fuel filter setup, the Wehrli Fuel Filter Housing is exactly the kind of upgrade you’ll wish you had done sooner. The factory cartridge-style filter might get the job done, but it’s not known for capacity, ease of service, or long-term durability. Wehrli’s billet filter housing addresses all of that with a well-thought-out design that’s easy to install and built to last. This kit replaces the factory filter housing with a CNC-machined billet aluminum base finished in a sleek gray anodizing, complete with the WCFab logo engraved on top. It’s a clean-looking piece that mounts in the exact same location as the OEM unit and uses factory-style quick disconnect fittings, so there’s no guesswork or custom fab work involved. Everything lines up just like it should, making this a great weekend upgrade whether you’re a seasoned DIYer or just looking for a bolt-on improvement.

High-Quality Construction & Design

The real benefit comes with the included Donaldson 4-micron spin-on filter and water separator. Compared to the stock cartridge, this setup offers increased filter capacity and better debris capture, which means more miles between changes and improved protection for your high-pressure fuel system. It’s also easier to service, no awkward caps or special tools, just a straightforward spin-on replacement when it’s time. One of the standout features is how Wehrli’s design retains the factory PTC heating element flow path, so your truck won’t lose any cold-weather capability. That’s an important detail for owners in northern climates who need reliable starts when temps drop. You also get a 1/8" NPT port built right into the base for fuel pressure monitoring, which is a nice bonus if you're planning to run a gauge or just want the option down the line.

Fits:

• 2017, 2018, 2019 GM 6.6L Duramax Short and Long Bed
• 2020, 2021, 2022, 2023, 2024 GM 6.6L Duramax Long Bed

Application Notes:

• IF YOU HAVE A 2023+ REGULAR CAB DUALLY, PLEASE USE PART NUMBER WCF100362
• NOT COMPATIBLE WITH 4500/5500 MEDIUM DUTY TRUCKS EQUIPPED WITH L5D DURAMAX