The Fender Flare Kit does not require any drilling or trimming of the OEM parts on the car. The Fender Flares are held on by 3M™ Super Strength Molding Tape, as well as the OEM bolts in the wheel wells. It is a simple installation, without the need to modify any OEM body panels, other than the removal of the OEM fender flares if equipped. The vehicle’s surface needs to be thoroughly cleaned with alcohol before the installation to ensure a proper bond with the 3M™ tape. We recommend applying adhesion promoter on the back side of the flares before installing the 3M™ tape to help with better adhesion. Apply double layers of the 3M™ tape for the best result. Optimal surface temperature for the 3M™ Super Strength Molding Tape is above 65°F (18°C).