I wouldn't say the gruppem does not work, it is an improvement over stock but it's basically a short ram intake with k&n pod and a carbon fiber 'ram'. The way it draws air into the scoop questions the effectiveness compared to a cold air intake induction like the injen intake. Flashpro is a piggyback ecu similar to the hondata kpro, you should use it for a custom tune if you have all your bolt on mods