Will this diffuser scrape on steep driveways or parking lot ramps?

DTM diffusers hang lower than factory bumpers. Measure the ground clearance at your driveway approach angle and compare it to the diffuser profile before purchase. If you frequently navigate steep inclines, account for this in your setup or consider protective underbody reinforcement.

Does this provide functional downforce or is it primarily cosmetic?

The DTM profile is designed to complement the factory aerodynamic package and visual styling. Any downforce benefit is minimal at street speeds. This diffuser is engineered for appearance and to match aggressive rear end proportions — not as a standalone performance upgrade.

What finish should I apply to protect the carbon fiber?

Clear coat is the standard protection for real carbon fiber. UV exposure and road debris can degrade the resin over time without it. Sand and prep the surface before applying your chosen clear coat finish — consult a carbon fiber specialist or your local installer for product recommendations that match your climate and driving conditions.