.. said above here. In my opinion the selin translator screws up idle by its design. The problem with it is that the MAF signal is not linear. If one side draws 0cfm at 0 volt and the other draws 6cfm at 1 voltage the selin will send 0.5v to the ECU. The thing is that 0.5 volt does NOT corelate to 3cfm of air. It would if the MAF signal was linear, but again, its not. What would probably help is to install what is called a drivabilitty hose between the intakes to even out the differences between the two MAF`s a bit. The closer they meassure compared to each other the better. It wont be perfect tho...