Today, I had my MT fluid replaced with Redline and had the car on the dyno to see what I gained since adding my FI cat-back! I gained a solid 5-10 horsepower over my HFC/Y pipe/stock cat-back so I'm very happy. I also have 5 gallons of VP Racing 103 octane race gas in and it definitely improved throttle response and definitely gave some power gains.
Here's one dyno run, I will post pictures and the other videos in my build thread!