Will this scrape on steep inclines or driveway approaches?

The VTX profile is designed to sit close to the bumper line without excessive downward extension. Verify ground clearance on your specific vehicle and driveway geometry before final installation — most stock suspension setups clear without issue.

Does this diffuser provide functional downforce or is it cosmetic?

This is a cosmetic diffuser. It adds visual depth and stance to the rear bumper but does not generate aerodynamic downforce. It's designed for appearance and profile.

What prep work is needed before I paint this?

Sand and prep the surface with standard automotive sandpaper before applying your chosen basecoat and clear. Follow your paint manufacturer's surface prep guidelines for best adhesion and finish quality.