a bad kit but I put up a post a long time ago how to build a "okay" kit for about $130. They utilize the same pump I recommended and well as nozzles but have upgraded the lines, master switch and pressure switch. They recommend mounting the motor in the engine area, probably so you don't have to hear that annoying engine winding sound...understandable. But these kits are super easy to build but you just gotta source the parts to piece it together. If you don't have the time to source a custom kit this a good starter kit as is. It just seems as if all their upgrades are asthetic (for looks) more than anything. The only other 2 options are adjustability based choices.....different nozzle sizes and pressure switch options. Nozzles...I say stay around 3.0 to 4.0. For the pressure switch....Do you want it running almost all the time (get the 2-10 psi one)?....you want it kicking in when the boost starts to pickup (get the 6-30 psi). I personally would just run the 2-10 switch....water is cheap...you can add a ethanol or methanol in the reservoir for an added octane boost. Good stuff. Read up on it....lots of info on the internet. Good luck.
