Will this wing clear the trunk lid when open?

The STI profile is designed to sit within standard trunk clearance. If your trunk has aftermarket struts or raises at an unusual angle, measure from the spoiler's highest point to your open trunk lid before final installation.

What's the mounting hole pattern, and will it work with factory hardware?

This wing uses factory-position mounting points. You'll need OEM bolts or equivalent fasteners (typically M6 or M8 depending on your vehicle's original trunk setup). The holes align with existing factory locations, so no drilling required.

Is this stable at highway speeds, or does it need reinforcement?

FRP wings are aerodynamically stable when properly torqued to factory spec. Ensure all mounting bolts are tightened evenly and checked regularly, especially after the first 100 miles. The one-piece construction distributes load across the full base, which reduces vibration compared to multi-piece designs.