Will this interfere with the trunk seal or air dam at speed?

The HMS profile sits low and forward on the bumper. Verify clearance with your existing air dam or splitter before install. Most setups coexist without contact, but measure your specific configuration to confirm.

Should I adhesive-bond this or drill mounting holes?

This lip is designed for bolt-through mounting into existing factory bumper holes. Drilling additional holes is not required. Clean and prepare the mounting surface, then secure with fasteners appropriate for your vehicle's bumper structure.

How do I prep and finish the carbon fiber before install?

Sand the mounting contact points lightly to ensure solid fitment and prevent rocking. The clear coat is already applied, so focus on surface prep where fasteners will contact. After install, a regular wax or sealant will protect the carbon finish from UV and contaminants.