Here are the results for a BMW E92 M3 I Dynoed yesterday at NRGtech Racing in Long Island. The car's mods were, Akrapovic Titanium X-pipe and Active Autowerke Axle Back system. This car has a great sound!
The car was originally run on the dyno with another tune first (not OE Tuning tune), then returned to original settings for a baseline pull, described by the blue run. The car was then custom dyno tuned to suit the exhaust modifications and gas quality (Red run). Conditions were extremely hot and humid, which is far from ideal. Great gains were seen, given the humidity on the while testing on the DynoJet Dynamometer. +17wHP and +19wTQ! The low end torque gains made this car feel very strong.
This product is available for US$795.00 (from OE tuning dealers and ECU send in) or $995 with E-Z Flash (includes 4x map pack). More information on map switching and OBD2 flash loaders for BMW can be found here: http://oetuning.com/blog/?p=162