I'm looking for $400 for the kit.. Heres a basic breakdown of the install (TVT had a guide with pictures which I can't find.):

Mount bottle securely in trunk - I made a custom bottle mount that mounted to the metal under the foam in the hatch. Most people will not want to rip out their foam and drill holes for the mounting bolts. This is kind of up to you to figure out how to do it.

Drill holes for blowdown tube and feed line - I think TVT ran the line without drilling, but I had a certain way I wanted to run it.

Cut fuel line for solenoid feed - The fuel feed t's off of the rubber line leading to the fuel rails.

Wire up kit - You will need to be able to wire a relay, the TPS switch and the arming switch. An arming switch is needed on the interior, so you will need to run 3 wires inside the cabin (easy to pass through rubber grommet on firewall). You will need to power the relay (that powers the solenoids) from a battery junction box under the hood by the battery box, and a key on hot wire from another junction box under the fusebox. The TPS switch taps into the TPS lead coming from the ECM.

Mounting Solenoids - you need to find a spot to mount the solenoids behind the engine. I will send my bracket but it looks horrible lol.

Mounting nozzle - you will need to poke a hole in your intake elbow to mount the nozzle (1/16 NPT). I will supply a soft nozzle mount, which I used on a silicone elbow.

I may have skipped something, but thats pretty much it. If I recall correctly it took me 3 hours or so to install it.

Here are some pictures of the headlight: