I have an RC51 in a custom off road vehicle that will be used in the sand dunes. I am trying to figure out a way to install Outerwears pre filter material to help keep sand out of the filter box inlet. This pre filter will likely need to be custom made by Outerwears one way or another but I am curoius what connects to the air cleaner box as it might make this much easier. I assume it is some sort of duct which could be perfect. Currently my outermost piece is the foam seal so a duct might make it much easier to fit a pre filter around. Any picture or part number would be very helpful if it is a duct. Thanks for any input or ideas.