These look like they would fit perfect with my fiberglass fenders! I have my raptor light connected to the side marker wire(I no longer have side markers) and the first thing I do when I get in the truck is turn the light knob to turn on the raptor lights and the badass taillights. Hooking these up to the side marker would be perfect for me. Also, the fiberglass doesn't fit perfect on the outer most corner of the headlight so these should cover it up!