You can make huge power with a snail but for the street a positive displacment is the best route. Gives you power everywhere where you need it on an unpredictable street. No waiting for it to spool up, makes a small block feel like a big block at 1200 RPMs
They could sell it as a $1250 option and people would but it. If they made some improvments, like make the discharge specific for it then they would only be into each kit mabey $500 with all the fitings and pipes. They could make a good profit on it.
Questions that need to be answered though are, how much did the IATs drop? How much boost was lost? How much HP gain is there? Does it cause any lag?
If it can drop the IAT by 30+* and only lose 1-2 psi while maintaing the same HP level or better then its a solid piece that should be made IMHO
With the ability to add more timing and more boost then that would allow KB to add another 60-80hp on their power claims