That is where a tuner like Frank Smith comes in to custom dyno tune your setup for your car. If you have 91 octane, 93 octane, meth, 100 octane, catless exhaust, whatever, he can custom tailor it for you. Active of course errs on the side of caution (also by dialing the redline back a bit) but a tuner on the dyno can tweak things a bit more aggressively while being safe. That is why you see some large gains up top here.
This does not just go for Active Autowerke but many of the 'kits' out there. There are several BMW tuners that have further refined the out of the box tunes. If you want to extract the most from your kit, a custom tune for your car is the way to do it. The proof is below.