That small bag is a strainer, stops the big stuff, like the cardboard disc from the inside of a cap, the filter should be replaced while you replace the confiluted hose, most likely wrong spelling.
I had a 03 RKC and was having a lean condition, backfire problem, the dealer and the indy both said the fuel filter had nothing to do with it and neither had ever changed 1.
I had to order it and when I replaced it I cut the old 1 open and found it was packed with what looked like rust, never had a back fire on decal again after that.