E46 M3 rear strut tower brace

Not sure if you guys already discussed this before, but I was wondering if some one here can tell from own experience if the installation of a rear strut brace will improve the cornering on my M3.

My M3 is for much the best car cornering on street and track I ever had, let us know, thanks!

I doubt it.

I don't have it. And I doubt many people do. Mainly because it won't make a difference.
Stiffer sway bars and/or shocks/springs/coilovers will.