ESS is working on a tune for the E92 M3 using my car. They are now working on one for the M3 with a high flow exhaust like this. We just thought is was crazy to see this dip, and everywhere else, it gained a bunch of power just like Akra claims. My graphs look nearly identical to these posted as far as the curve, and difference in stock vs Akra power.
2008 M3 Sedan- Alpine White