Will this wing use the OEM trunk lid mounting holes?

Yes. This wing is engineered for existing factory attachment points. Before final installation, verify your mounting surface is clean and free of debris. If you're installing over an older trunk lid or have aftermarket modifications, test-fit the wing bracket alignment first to confirm hole spacing matches your setup.

Does this spoiler stay stable at highway speed?

Carbon fiber wings are structurally rigid and hold their aerodynamic geometry under load. Proper fastener torque and secure mounting to factory points ensures consistent performance. Reference your vehicle's service manual for correct fastener torque values to maintain structural integrity during normal driving.

What's the best way to maintain the carbon fiber finish?

The clear coat protects the weave underneath from UV exposure and minor contamination. Wash regularly with mild soap and water, and use a soft cloth to avoid scratching the surface. Avoid harsh compounds or abrasive pads. The clear coat can be polished or reapplied if needed to restore gloss over time.