How much tire clearance do these flares add?

These are designed as over fenders, so they sit proud of the factory bodyline. Verify your wheel and tire diameter against the flare extension by test-fitting or measuring your setup before committing to paint. If you're running significantly wider rubber, confirm fitment with your wheel offset and suspension height.

Do I need to drill holes to install these?

Installation method and fastener requirements depend on your existing body panels and mounting strategy. Reference your vehicle's factory attachment points and determine whether you'll use existing holes or create new ones based on the flare design. Most builders use self-tapping fasteners or rivnuts into the FRP and underlying structure.

What wheel sizes and offsets will work with these flares?

Compatibility depends on your suspension setup, ride height, and tire sidewall. Measure your current wheel diameter and offset, then mock up the flares (or reference factory Evo X specs) to ensure your setup doesn't rub. Negative offsets pull the wheel inboard and may require more clearance; positive offsets push outboard. Test before final installation.