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414 Posts
Discussion Starter #1
I was curious so I cut open and examined the oil filters that I use on my 2 liter engine.

I noticed that the Mahle filter I use, the OC-25, does NOT have an anti back flow valve.

Hmm... is this how the OEM Alfa filters were constructed? Personally, I don't think it is a big deal... but I did find it curious.


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