Will this fit into my current mirror housing without any cutting or drilling?

Yes. This lens mounts at the factory attachment points on your mirror assembly — no modification needed. Just remove your old glass and bolt this one in.

Do I need any fasteners or adhesive to install this, or does it come with hardware?

The lens assembly uses your existing mirror bracket. Check your mirror housing for any factory clips or fasteners — most Pilot mirrors use mechanical retention, but test-fit first to confirm what you're working with.

Is this glass heated or does it have any special coatings?

This is a straightforward mirror glass replacement. If your original mirror was heated, your wiring will remain intact — you're only swapping the glass panel itself.