Do these over fenders require drilling into my original fender?

Over fender mounting varies by setup. Reference your vehicle's OEM fender structure to determine your preferred attachment method — existing holes, additional drilling, or adhesive-backed fasteners all work depending on your build approach. Plan your mounting strategy before prep and painting.

What prep work is needed before painting?

Sand the surface with appropriate grit to establish paint adhesion, then wipe clean of all dust and debris. Follow your paint manufacturer's recommendations for primer application and topcoat. FRP accepts most automotive finishes once properly prepped.

Will these fit flush with my factory fenders, or will there be gaps?

Panel gaps depend on your specific vehicle's condition and how straight your original fenders sit. Once installed, you can fine-tune alignment with shims or fastener adjustment. Test-fit before final fastening to achieve the gap you want.