Will this diffuser scrape on driveways or steep inclines?

Diffusers hang low by design for visual impact. Before installation, measure your existing rear bumper clearance to the ground, then account for the diffuser's extension. Test your driveway approach angle with a test fit to confirm adequate ground clearance in your daily driving conditions.

Is this a functional diffuser or purely cosmetic?

This is a styling diffuser that delivers aggressive visual presence. For functional aerodynamic gains at street or track speeds, you'd need a much larger undertray or diffuser package paired with splitter and wing systems. This piece does the look; the function comes from the complete aero suite.

What hardware is needed to install this?

Reference your vehicle's OEM rear bumper bracket and mounting hole locations before ordering fasteners. Most bolt-on diffusers use self-tapping or threaded fasteners into existing holes; confirm your rear bumper's hardware configuration to ensure compatibility with this diffuser's mounting points.