Originally Posted by M3DCTBT
What Mike is saying is that AFR curve is a large step backwards from even a stock fuel map in both mid and upper.
It is designed for the full dinan exhaust and does not work well with others from my experience on the dyno.
I wonder what the difference would be If I actually had a Dinan xpipe (HFC) installed with my Dinan tune. But probebly better I get another tune someday down the road.