199 and up for on/off type kits that are pressure or voltage activated (i.e. MAF, etc.)
449 and up for progressive tunable kits that include their own onboard MAP sensor.
We almost never sell non-progressive kits because the progressive ones allow you to flow more water/meth without the harsh on/off and they also give you great tunability with the Coolingmist controller. It has knobs on it for simple adjustments and a serial port to connect to with a laptop using their free software that allows you to tune it further.
I used one of their progressive kits to push 30+ psi on my car with no intercooler. 