Doing some research on why we were having issues (fit, longevity, durability) with some reduction gear filter elements, I found that there are a handful of small manufacturers just within Texas and Louisiana. They will find a high volume or high dollar filter for the local industry and market then sell them to the penny pinching company purchasing agents. They advertise that they can build any filter with the same quality but less expensive. I'm sure they'll market the filters on these trucks and slap them together and put them on Amazon or eBay. I bet there are just as many or more that have them built in China too.