Doc's Diesel Fuel/Water Separator DGF430+DGF401 | Compatible with RAM 6.7L Cummins 2500, 3500, 4500, 5500 2019-2024 | Replaces 68157291AA, 68436631AA

I’m very satisfied with this fuel and water separator set. It fits perfectly on my RAM 6.7L Cummins and the installation was straightforward. The build quality feels solid, and it gives me confidence that my engine is getting clean, properly filtered fuel. I’ve noticed everything running smoothly since installing it, and it’s a great value compared to more expensive options. Overall, it’s a dependable replacement filter set that does exactly what it’s supposed to do. 👍

Installed these DOC diesel fuel filters on my Ram 2500 and immediately felt like my truck judged me for not upgrading sooner. First impression: these filters look serious. Like they clock in early, don’t complain, and silently remove contaminants with blue‑collar dignity. I half expected one of them to ask if I’d checked my tire pressure lately. Installation was smooth no interpretive dance, no blood sacrifice, no muttering words I can’t say in front of my kids. Everything fit exactly how it should, which in the diesel world feels borderline miraculous. Five minutes in and I was already suspicious: Why is this going so well? Once installed, my truck fired up like it had just been reminded it’s a Ram 2500, not some grocery‑getter. Throttle response felt cleaner, idle was smoother, and the engine sounded like it had just had a large, refreshing glass of premium, judgment‑free fuel. I swear it even idled with more confidence. Since installing these filters, my truck: Starts easier Runs smoother Seems personally offended by low-quality diesel Gives off big “I can tow that” energy These filters do exactly what they promise: they stop garbage fuel from ruining my very expensive lifestyle choice. They’re basically bouncers for my fuel system “Sorry, dirt, water, and regrets… not tonight.” Highly recommend DOC diesel fuel filters if you: Love your Ram Hate injector problems Enjoy preventative maintenance that doesn’t cause emotional distress Five stars. Will absolutely buy again at the next fuel filter change, assuming my truck doesn’t decide it’s invincible now.

Fast shipping Filter seem to install like oem Build quality seems well will purchase again..

This is the second time I've ordered and installed it. It fits perfectly, and there are no performance issues at all. I will definitely recommend it to save yourself a buck or two.

After two months no issues and a perfect fit for 2023 Ram 2500.

Fit my 21 cummins perfect, only issue I had was one of the seals was damaged in the box anf didn't see it before I was already doing the job so I had to get a new seal.

looking forward to the next oil change so i may provide more feed back in performance on this products for a first time user. process of installation was simple all parts O-rings ect fitted just right with no leaks. I have done research on other products and Doc's seem to be the products that made more sense for the 2024 ram 2500 Cummings diesel I drive every day as a business vehicle. This is my first time doing a oil change on my truck my self and even though i have very little experience in mechanic stuff I feel confident this product wont let me down.

Very good filters, will order more in the future.

Look like the real thing and fit properly. Come in a non-descript cardboard box with a little white label that says Doc's Diesel and part numbers

Fantastic kit great quality fast shipping

I've heard a lot about Docs filters. They arrived quickly and fit well

Great price

Works great so far