Evolve box installed on my car by Southern BM a few months ago. Good lift in performance, no downsides. Combined with MPerformance exhaust and Quaife LSD, the car is transformed. Who needs an M3 for double the price.
As to all the agonising over potential risks, AFR etc, it's Pretty simple really - rather than over analyse, if you don't like the sound of it, don't do it.
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