this..
Constructed from the same material as the U.S. Type-R rear strut tower bars with the quality and craftsmanship you come to expect from genuine Honda products.
..indicates to me that it's a knock off.
edit > well, maybe not.. he does claim it's authentic, compares it against the rear strut bar (for some odd reason), and has a pretty good feedback rating. so... :dunno:
btw, the price may still go up with some last second snipers..