One other thing about the EGR system is they usually are disabled at wide open throttle. They always did that just like if the AC is on the AC clutch is disabled at wide open throttle and so you have max power at wide open throttle. So it wont bother performance at WOT. And at WOT the PCM goes in open loop and runs on the readings from all the sensors but not the 02 sensor. Like most performance PCM's can be programmed for the vehicle to run normal and pass emission's in all modes other then WOT which is open loop and then the PCM can be programmed for max performance at WOT. So you could still enable it for your cruising around if you want since it wont be working at WOT. The PCM will turn it off by the EGR solenoid. Ron