The filters aren't backwards, my brain was!!!!! Sorry about that. Just checked, I think the large pre-filter is 45 micron (Speedway motors) and the smaller before carb is a Summit 10 micron.
You need a bigger pre filter than a 45 in my opinion and hopefully they`re not screen filters but sintered...............Taking over the world one carb at a time...........ThumperCarbs...........
