The price remains the same on the kit no matter which HP level or boost level you want.
The hardware is the same.
Just a different supercharger pulley, belt and software are supplied.
All of the R&D was done at the same time so we cannot justify charging more money for parts that cost exactly the same that are different in size.
Boost levels will be 5-5.5, 6.5-7 and 7.5-8 psi
Boost and HP will naturally fluctuate with ambient temperature.
For different octane fuels the only thing that usually and logically needs changing in the software is the target ignition. We will post more information on this and the software.