That´s the so called "Jochstrasse", it´s between Bad Hindelang and Sonthofen in the Bavarian alps, close to the Austrian Border.

 

In my AP1 I use the '00 front and AP2 rear bars, along with CR springs and shocks and 225/255 tires. I have my own little suspension-calculation spreadsheet and compared to the stock CR, my wider front tires and AP1 rear roll center more than offset my softer rear bar (i.e. my car "should" understeer slightly less than a stock CR - and that's not even accounting for the CR's wing!).

Regardless, I've never met an S2000 that had a problem rotating, no matter what the spring rates -- including when I ran NO rear bar. A little trailbraking goes a long way in this car.