Will this scrape on steep driveways or inclines?

The GT Spec profile sits at the factory rear bumper line, so clearance mirrors your OEM setup. Check your vehicle's existing ground clearance at steep angles — this diffuser won't extend beyond that baseline.

Does this provide functional downforce or is it cosmetic?

This is a styling piece designed to match the GT Spec aesthetic. For aerodynamic performance, pair it with a properly engineered rear wing and undertray setup tuned for your power level and track conditions.

What finish should I apply to the carbon weave?

Sand the surface with fine-grit media and apply a UV-protective clear coat or color of your choice to preserve the weave and protect against UV degradation. Your preferred automotive finishing system works — just ensure proper surface prep beforehand.