If you need an additional o2 sensor bung, any quality exhaust shop would weld one in for under 15 bucks. Then buy an o2 cheater and voila- no cel.
I had a serious issue with the quality, fit and finish of my OBX header, and I will never own another obx product. However, I have heard the duratecs are a little better quality. You dont need a tune now.
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