Designed to sit on top of your stock GT fender delete.
Recommended for those who love the open tire look, but more importantly, to protect your feet from the wheel while adding a tad more deflection from debris or water.
The stock screws will not work with this. I would recommend using M5x16mm Flat Head, countersunk, machine screws.
Notice: Due to the curved shape of the design, I would rotate the print 45 degrees in your slicer program (diagonal on the x/y axis), this should allow the z seams to align off the faces and ensure you get a clean finish on your print.