I agree, the DP is a must have and totally worth the smell. The little bit of inherent B58 turbo lag on a roll is now gone, throttle response is instantaneous, and overall, the car is stupid aggressive with an intake and JB4 map 3. Turns a lot more heads than with the stock DP (unfortunately from cops too). I now throw it into comfort when I see them and that tones it down.
I used this angled defouler on the top O2 and have driven 400 miles with no CEL. A few B58 peeps around here are using the same one with no CELs:
https://www.amazon.com/Dewhel-oxygen...ensor+defouler