hey there, im way new to the wrx scene and noticed your in utah...i live in vernal utah and don't have many resources here so if your able to help me i would greatly appreciate it. so i purchased an 07 wrx tr, i bought a full 3" inch exhaust with a catless downpipe and intalled the 02 sensor in the pipe.. the car is idleing like crap after i get the rpms up and let it idle, the more i read about not having the cats and all the supporting mods or maps the more damage it could do to my motor. so if you could provide me with any direction as to what to do to my wrx that would be great.