Since you already run stg2 adding dp and fmic won't make that much of a difference on the power band, you'll just have a greater level of consistency making that power due to the lower temps on iat and egt and a deeper sound of course. If you track your car they are a necessity otherwise I wouldn't pocket out.
Imo the best sound on our cars is produced with catless dp and stock exhaust but the looks of a quad is great. I 'm not very helpful I suppose
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