Manged to get it partially working,

Filtering works as intented on the products_all page, i can filter there for my attribute.

I have created an attribute that holds the value (vehicle the parts fits on)

On the products_all page it works great and shows me the right products with that attribute.

When i go to the category page, which shows me a list of all the products in that category, it does not work.

I Will try to explain with some screenshots..

Everything working correctly in the products_all screen:


Failing in category screen:


Hopefully somebody can point me in the right direction to get this fully functional, im possibly doing something wrong

Click image for larger version. 

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