This is the Jetting AND Pre-Filter AND Filter Skins PLUS the installation DVD solution for the 950 Adventure, Super Enduro, Super Moto. Includes 2 specific length hoses to vent the carburetor bowls that replaces the Y. The prefilter is factory oiled and ready for use. What are "FilterSkins"? They are a package of 3 nylon "skins" that go over the Pre-Filter. They allow you to field "clean" a Pre-Filter by removing it and replacing with another.