Some of the power gain is achieved from raising the redline. I wonder how high it is? Max power is at 8600 rpm, so, maybe 8700. I wish they could have lightened it more but 1570 kg for the package is not bad. I bet the 1570 point is its real weight vs. the 1685 kg for the supercharged car no doubt taken from BMW's "unladen" weight plus another 10 kg. Most M3s do not weigh this much, supercharger or not.
I think its pretty cool that they did this with just the Akra exhaust plus the top end work and tune. NA FTW.
I've been assimilated. 6MT/ZPP/18"/PS extended.