- Joined
- Sep 23, 2025
- Messages
- 3
I ordered 4 new WIX 57055XP filters for my Subaru. I was surprised they are now manufactured in Mexico. I still had a filter left that is made in the USA, so I decided to cut them open to see if there are any visible differences. I am no expert and am not endorsing either of these. Just decided to share my cursory findings. Also did not take any masses (yet).
Both filters appear to have correct thread pitch. Everything else is different. The USA filter has 44 pleats and is longer and white, Mexico is 38 pleats and is yellow. USA uses a stamped leaf spring, Mexico is normal spring. The style of bypass valve has changed. The louvers on the Mexico filter appear slightly more open than the USA filter. The anti drain back appears different as well.
I don't know if one performs better than the other. This just tells me there were major changes in the design and manufacturing process.
Both filters appear to have correct thread pitch. Everything else is different. The USA filter has 44 pleats and is longer and white, Mexico is 38 pleats and is yellow. USA uses a stamped leaf spring, Mexico is normal spring. The style of bypass valve has changed. The louvers on the Mexico filter appear slightly more open than the USA filter. The anti drain back appears different as well.
I don't know if one performs better than the other. This just tells me there were major changes in the design and manufacturing process.