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This page was pulled do to a conflict in the installation process.
If you wish to view the information try here
There may be changes to the information now that I know about the expansion and possibility of them becoming brittle.
I would suggest over sizing the holes in the plastic. Adding rubber or nylon washers to the truss head screws and double sided foam adhesive between the flare and fender lip.
That install page will be edited to reflect the changes and replace this page, when time and further investigation permit.