Will this interfere with my trunk seal or rear bumper gap when cornering hard?

The R500 profile extends downward from the air dam; it does not affect trunk seal geometry or bumper fitment. Verify your vehicle's bumper height and any aftermarket lowering spring setup against the lip's mounting points before final installation.

Should I adhesive-bond this or drill through the factory air dam?

Both methods work with carbon fiber, but adhesive contact is cleaner and preserves the OEM air dam. If you choose mechanical fastening, pre-drill pilot holes to avoid micro-cracking the material. Use epoxy or automotive-grade construction adhesive rated for carbon-to-plastic bonds if going the adhesive route.

How stable is this lip at highway speeds with no additional bracing?

Real carbon fiber's inherent stiffness handles sustained highway loads without flutter or flex. The one-piece construction means no stress points. Verify all mounting surfaces are clean and properly tensioned after installation to maintain stability long-term.