[1988gmc355]

http://www.wixfilters.com/assets/techBulletins/Wix/GM%201.4L%20Oil%20Filter%20Product%20Alert%20%20English.pdf

I think Wix has an article on this too, I seems there is two models of filter depends on the Hengst or not. The "normal" filter is 57674 for the none UFI cap according to RockAuto.

Here is the article, I think this answers the OP's Question.

 

[1988gmc355]

Wow, very interesting. So GM used both Hengst and UFI filter housings on the 1.4L?

Hopefully the same is NOT true for the 2.0L diesel. I just put a WIX filter in last oil change...ugh.

I found this when researching the Wix filter specs, from the way I understand the article this is only for the 1.4L. Does the 2.0 use the same still housing and cap? I would think it would be tough to install the wrong one.

FYI my car was built 03/11 and the 57674 is the only Wix filter that RockAuto shows that works with the 2011, so I wonder if the variations could come from the model of the vehicle since a few are listed in the bottom right.