"JET is a piggy back system. A Piggy back system functions by decieving the PCM into thinking the parameters from its sensors are different than it actually is. Generally they force the car into thinking that intake temps and airflow are different than they actually are. When the PCM sees the false inputs from the JET "module", it dials the AFR to match what it thinks is going on. The problem with this is that it causes the AFR to go to hell and will cause the car to run either insanely rich or retardedly lean depending on the actual conditions. The Jet Module would make your car run anything but a Stoichiometric mix. If your car decides to run too rich, you'll burn up your O2 sensors and Cat. Too lean, and well... prepare to see a melted piston."
I'd wait until a real tuning solution is available. sorry
This was a crazy for a while for the 6th gen Accord. People hooked them up and had problems like stalling and low idling. It was once talked about in Super Street magazine because they did a dyno.