As near as I could determine this box modifies the signal of the IAT and tells the ECU the intake air is cooler than it really is. Probably would help richen up WOT/high-load open loop operation but in part throttle light load closed loop operation the O2, MAP and MAF input would probably run things per normal. I'm just wondering if the "out of spec" IAT values would "throw a code" and light up the SES/Check Engine light. Now If I could get the correct wiring harness connectors so I could just plug the thing in without cutting or splicing my factory wiring I'd probably give it a try. At least during hot weather or when I'm off to the track. But I'm not cutting up my factory wiring while my warranty is still in effect !

Slim