No cutting required on the car itself....just on a plastic underpanel. That cut is made after the panel is removed from the car. Simple to measure and cut. BUT...U-Haul has devised a way to avoid the cutting. They just throw your whole panel away. Problem solved. I saved the piece I cut out and trimmed and epoxied it back in just to try to keep winter salt etc. from getting where Honda didn't intend it to be.