I figured I would start a thread about my last year and a half journey. I bought a 08 E92 335i with 45k miles on it here in Atlanta in April of 2015. I went FBO within the first 3 weeks of owning the car. 6 months in I installed VRSF inlets. I had a periodic misfire on cylinder 3 could not seem to determine the problem. I spent the better part of 3-4 months not able to full throttle my car or it would misfire. Long story short the dealership installed the injector wrong and the head was damaged and allowing exhaust to pass. So a new head was purchased and the fun began.