If you search around you'll find some Duramax guys that hate them. I was skeptical as well, so I use a Wix water separator with a drain... part # WF 10022. If you want, you can add a clear bowl to the bottom of that... part # WS 10003. For the filter I use a Wix # 33693 and then a GDP engine mount filter setup with a Big Line Kit feeding the CP3. For that filter I use a Donaldson Blue DBF 5814. If using just the Fass setup, I would use that Donaldson filter there. This is just me on my 2012. I'm no filter expert by any means.
Sent from my SM-G950U using Tapatalk
Bookmarks