Will this diffuser scrape on steep driveways or inclines?

The diffuser extends below the bumper line, so approach angles matter on steep entries. Test your typical driveway pitch before final installation, and adjust your parking technique accordingly. Consider your usual driving environment when positioning the mounting brackets.

What finish should I apply to the raw FRP panel?

Sand and prep the FRP surface with your preferred grit before applying your chosen paint system—automotive urethane, acrylic lacquer, or epoxy-based topcoat all work well on FRP. Primer helps with adhesion and UV protection, so a quality primer base coat is recommended before color.

Is this diffuser functional or purely cosmetic?

This is a styling piece designed to complement the Twins aesthetic. While FRP diffusers can aid airflow management under the rear bumper in theory, treat this as a cosmetic upgrade. Real aerodynamic benefit depends on full diffuser depth and your vehicle's underbody setup.