I just installed this same kit in my car last weekend.
The NMU (Nitrous Management Unit) houses the solenoids along with a switch thats calibrated to your position sensor on your throttle body. It's a peddle to floor activation setup. Real easy...
The NMU also has a safety system... If either of your inlet pressure's drop, Fuel or Nitrous, the NMU will kill the solenoids to prevent potential damage to your motor.
here's a PDF if anyone is interested in the Kit
http://static.summitracing.com/globa.../cca-82021.pdf
PM if you have questions or post here
After a good wash
My airbox has to go!!!
The airbox does hide it well though...
NMU
Bottle is mounted to a board that use to have my amp mounted to it
