wix oil filters

[Sal Lubrano]

After doing some research i have found two oil filters which seem to be very popular with the biggie oil filter adapter. 51258 and 51049 But I have also noticed one of them does not have an anti drain back valve. Am I missing something here? Why are people using the wix 51049 since there is no valve. Here are the specs on both.
Part Detail

Part Detail

 

[Hot Air]

The Biggie OIl Filter adapter tech sheet lists the WIX 51258 only. I use the NAPA 1258 as it is readily available at any NAPA store. I cannot find Wix filters locally.
Conrad

ps...folks are probably using the filter w/o anti-drain simply because they don't know better.

 

[Royal-T-Ltd]

yep i use the Wix 51258 and can find'em at our local Oreillys Auto.

 

[Quiky One]

Wix number 51258 does have an anti drain back valve. The old Buick 455's use this oil filter and they were mounted horizontally with the 51258. I just checked and the one sitting on the shelf has one...

WIX Filters : Filter Look-Up.

Edit: Go to any parts store and ask for AC Delco PF24 cross search. If you have a Napa they sell the wix renamed Napa Gold with a different number. It is usually just with the 5 cut off. So 1258