That's a pretty nice looking piece. I could see that making a bit of power, especially since they say it seals to the hood. Honestly the more surface you have to allow air into the car the better it's going to run, you really think trying to feed 2 turbos thru that tiny stock slit in the fender is as good as an open element filter? The more air that gets fed in and less restriction on the turbo's is going to decrease spool time (means they spin up faster), can pull more in (means it makes more power) at a higher velocity then that measly little 4" opening they have stock.
Many cars get huge benefits from an unrestricted intake, especially cars with a power adder. My Cobra made 365rwhp stock, I put a K&N CAI on and it made 392rwhp, that's almost 30hp to the wheels. Same day, never unstrapped from the dyno. Did a pull, installed the K&N and did another pull. The LS1 engines make 15-25rwhp with just putting a "lid" on it. Make no mistake intakes done right make power.
Another thing to many people over look is "where" the engine makes power. Everyone is obsessed with "peak" numbers they forget to look "under the curve" if you have 2 identical cars both making the same peak HP but one car makes 15HP more everywhere in the power band, that car is going to win. A good intake will help the car make power everywhere, not just peak. I've beaten plenty of cars that make 50 more peak HP power then my car, only because my car made more power for a longer period of time everywhere in the rev range.