Yes, it is a bypass style filter. So as Steve pointed out the only amount of oil that had to flow through the 5 what look to be about 1/4” holes is what would flow through the one small hole in the center. In the NAPA filter the oil just flows through the two smaller holes. I would guess the mfg. of the filter you took off has 5 hole end plates punched out like that by the thousands. Since many filter applications are a general diameter they can thread the center hole for the proper threads and use those same plates for hundreds of applications. Many of which today are full flow which require to be able to flow all the oil the pump puts out. The mfg. of the replacement NAPA filter which is WIX for some reason decided to utilize a special end plate for this type of bypass filter.
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Today's Featured Article - Product Review: JB Weld - by Staff. JB Weld is basically an epoxy glue that does an exceptionally good job of bonding to cast iron and steel along with several other materials. As I mentioned, it is so common that I have yet to buy a tractor that did not have JB Weld used somewhere. It is sometimes used so well you can't tell its there and other times used as a sloppy quick fix. Finding where and how it can be used correctly is key to whether you are using it as an "inelegant hack" or an integral solution to difficult and expens
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