So, the mustang is sold, and by April I'll be actively searching for an Evo. I tryed to do some searching on my future ? with mixed results, but I'll throw this out there and see what the consensus is. I will be using Evoscan or Mitsulogger for my datalogging, and Ecu Flash to make any fine tuning adjustments after a good base flash from either Al or Jestr. I'm really liking the idea of using a QTP?(I think) electric cutout/dump pipe so I can go from stock to ready to rock with the flip of a switch on the exhaust. Now, keep in mind I'm using EcuFlash and I don't really want to be swapping tunes back and forth for every time I open the cutout. My thought is to have a tune for the cutout, and then just drive regularly with the exhaust closed for the majority of the time. Obviously it's a compromise, but as long as MPG and drivability isn't effected greatly it doesn't bother me. Anyone see a huge problem that I"m over looking with this? My other concern is throwig a cell for the rear 02's when I open the pipe since the aft cat 02's are pretty much by-passed when the cutout is open. Is there a way to "turn off" the rear 02's? Or does the cell only get thrown when you eliminate the cat and it reads to high of a voltage, but doesn't get thrown if the value is below a certain threshold? If nothing else it would freak folks out at the track here when I pulled up next to them in a quiet little 4 banger then all of a sudden in less then 5 seconds the thing goes to sounding like a possessed monster when you open the cutout and get on the 2-step.