Will this diffuser scrape on steep driveways or inclines?

Carbon fiber diffusers sit lower than OEM plastic, so clearance depends on your vehicle's suspension height and the angle of approach. Measure the lowest point of your current setup and compare it to the mounting location before installation to verify ground clearance for your driving patterns.

Does this three-piece design require any additional fasteners beyond what comes in the box?

The three-piece assembly allows you to install each section independently. Verify your vehicle's existing mounting points and fastener locations — you may use OEM hardware or upgrade to stainless steel bolts for corrosion resistance, depending on your local climate and preference.

Is this diffuser functional or purely cosmetic?

VRS style diffusers are designed to improve rear-end airflow and reduce turbulence at speed, offering both aesthetic appeal and aerodynamic benefit. Real carbon fiber construction ensures durability under high-speed driving without the weight penalty of plastic alternatives.