Originally Posted by benzy89
IMO, go with AA. Why? Because they're a golf standard product on every BMW platform they've decided to mod. Something I really like that the AA, Fabspeed & Akrapovic DPs all feature is the OEM style subframe mounting bracket (circled in red below). While it's a really minor detail, it ensures the closest to OEM fitment & guarantees that the DPs will not rotate once installed (thus, avoiding any subframe rubbing even after everything is bolted back up).
At the end of the day, it's your call & if that extra cost justifies the product quality. But if I had a choice between these specific products, I'd be making an appointment with that shop to get the Active Autowerke DPs installed.
The stock DPs probably weight 3x what the aftermarket pipes weight. Also the stock pipes are bendible/flexible. IMHO the subframe mounts are not needed on the aftermarket DPs. If anything I would be afraid they might make install more difficult. I never had any rubbing on my AR DPs.