Great progress over the last few weeks. I now have Fabspeed race headers, Circuit Werks cat bypass, and the aforementioned Agency Power muffler, total weight reduction of 34.4 lbs from the exhaust. Vivid Racing tune removed the CEL and helped smooth power delivery, it is a freaking rocket now, I would say at least 996 fast and definitely feels as quick as my previous 987S if not more so. The sound is absolutely, positively, epic. Actually less annoying drone than just with the muffler, way more power through the entire RPM range, and totally linear. GT3 console delete saved another 2 lbs, cleaned up the interior, and game me a little more legroom. So I should be at 3008.6 lbs and somewhere in the ballpark of 285 HP, I'm happy as can be!