
After reading a review that a reviewer had received a fake filter I decided to use the M1-108A filter that I received from Revain (sold and supplied by Revain). to compare to the one I bought from Advance ( reputable national auto parts dealer). They are identical except for the format of the serial number. Approximate dimensions are 2.75 inches in diameter and 2.75 inches long. Visible internals include a red drain seal and metal relief/bypass valve body. I have attached photos of the pre-purchased filter for reference. As an aside, at a cursory glance, the M1 filter appears to be identical in design to the standard Carquest R85358 filter.

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