bo9roadking: Thanks for posting this. I'm encouraged by the information you've provided. The sprintex canned tune I'm running is pretty good, but I feel like it could be better. I may consider getting a professional tune this spring or summer. If you don't mind, could you post your tuner's info? Also, did you weld in a separate bung for your PLX gauge, or did you replace your original O2 sensor and wire the PLX provided sensor to your jeep's computer? After reading your initial post I looked at the link you provided and it seems as though you can replace the original sensor, but I wasn't sure if that's the route you took. Thanks again and congrats on the progress you've made with the magnacharger.