Donaldson P550127 Fuel Filter, Spin-on Donaldson branded filters are designed specifically to give you effective, consistent performance over the life of your engine Cost effective fuel filtration doesn't mean having to cut corners. We sweat the little things (so you don't have to.) We use top quality components to make top quality filters whether premium or standard. Heavy-duty components  like baffle plates, springs, seams, can housings, liners and springs  all contribute to creating filters that are built to last and built to perform