Cut open a new Wix 51036 to have a look. It's the equivalent to an ACDelco PF52. Forgot to take a picture of date manufactured, but it was manufactured on 7/21/15 Line D shift 3. Pleat count total is 54. It weighed 10.0 oz. Best looking glued seam I have seen on a filter in a while because it's hard to tell unless you look at it real good. I did take a picture of the seam side and the opposite side.