Im skeptical about that piece of alum. My guess is that they did a dyno run while the motor was hot. Then 2 hours cool down added the spacer then redynoed. I cant imagine that it would work that well. Just because it works on carbed cars doesnt mean its the same for a efi setup. By looking at the piece u can almost make one yourself(know anyone w/ a dremel or a someone w/ access to a Bridgeport?) I would wait and let someone else buy it and get their opinions. -Mark