Originally Posted by HerculesPeanut
I can only tell you from personal experience. My Cobb Stage 1 was not noticable to the Butt dyno. My downpipe, not really noticable. My new wheels and tires, noticeable from a standing start. Your 2/10ths savings would all happen at that point and if all you are measuring is that point, it is noticeable.
You likely changed the rolling diameter.