[hatzie]

I usually run WIX filters that are badged WIX or NAPA
There are actually only a handful of Western filter manufacturers.
WIX, Baldwin-Hastings, Mann-Purolator, Champion Labs, Allied Signal (FRAM), and Donaldson.
Donaldson makes high quality big equipment air filters for tractors, tractor trailers, and earth moving equipment as well as heavy dust collection filters for manufacturing.

FRAM makes top shelf air filters for automobiles and light trucks. I use them on my vehicles because the quality is top notch. IMHO You're not going to find better quality air filters for automobiles and light trucks. I've had problems with their oil filters but I'm not going to start a holy war.

WIX <DANA>, Baldwin, Mann-Purolator, and Champion Labs make many of the filters you get from OEM brands like AC Delco, Motorcraft, MOPAR, Honda, Toyota, Fuji (Subaru), VAG Gruppe (VW, Audi, Seat, & Skoda) etc.

Mann & Purolator had issues with their fluid filters immediately following their merger several years ago. These teething issues have been dealt with.

I'm not sure who is making K&N oil filters. Rumor had it that Hi-Flo in Vietnam was making them a couple years ago. Not a fan of Mainland Asian manufacturers.
QC is questionable, at best, in India, China, and Southeast Asia.
Japan, Korea, and Taiwan are generally up to Western manufacturing standards.
The former Iron Curtain Eastern European nations have quality levels on par with East and West Germany.
Some of the highest quality manufactured Makarov, Tokarev, Siminov, and Kalashnikov firearms were manufactured in the DDR, Czechoslovakia, Poland, and Hungary. I have a medium sized horizontal milling machine that was made in the DDR sometime in the 1950's or 1960's and somehow made it to New Hampshire of all places. It's a thing of precision beauty.