thats similar to a product called a "scary fast", i think the theory behind it is that ......
1 - it puts all the air to the bottom of the slide while under half throttle
2 - it didvides and shapes the air into a cleaner stream instead of swirling air without it,
i'd like to see if it really does help at all?????
edit.....
heres what the one "scary fast" says..........
PowerNow™The POWERNOW PLUS™ works by controlling the air stream after the slide. In a stock carburetor, at lower throttle openings (idle to 1/2 open), the air expands or “breaks” into the larger area quickly as it passes through the carburetor, and is uncontrolled, not achieving maximum productivity. By reducing the area in front of the slide via the trademarked POWER NOW PLUS™, slicing this air into two smaller masses, the air does not break as far, and cannot spin, it is forced to move forward filling the cylinder in the shortest time and making the most power at lower throttle openings. The result is instant power gains.