After spending a number of months with our PROFLEX Commander for E46 M3 and putting it through the paces on the road, track, and dyno, the independent E46 M3 enthusiast website Buildjournal has released their extensive review of our system. Their post addresses what E85 is and debunks common myths, explains why car owner seeking more performance should run E85, and what the PROFLEX Commander is and what it does. Their writeup is well worth the read for BMW E46 M3 owners wanting to maximize the performance of the S54 engine.

"In short: the AFD PROFLEX Commander kit makes power both safely and reliably. The kit retails for $800 and in our opinion, is well worth every penny."