Originally Posted By: Sayjac
The 1358 is an outlier of the standard Napa Gold filter construction. My 'speculation' is because it's applications include many/majority OPE applications it uses a nitrile adbv, dome bypass and perhaps even the louvered centertube. Garak has shown those filter aspects in a thread of 1358 some time ago.
Yes. I simply returned the one example with the closed louvers, and got another 51358, used another after it, as I recall. Mine was an actual Wix, but, as always with NAPA Gold versus Wix, construction was identical. As you can see, I am using the NAPA Gold 7356. Generally speaking, I can get the Wix 57356 cheaper than the specified 51358, and could get the 51356 cheaper than the previously specified 51365, though I'd use all four filters with confidence, assuming something wasn't obviously wrong, as in that one example I posted.