I've got a BRZ, and it is significantly more forward biased on spring rates than the FR-S. It has a natural understeer. I'm already using the Perrin 19MM bar on soft (only 25% stiffer than stock), and it still understeers. I'd like to get a bit more steering
Gotta keep an eye on front tire wear and G data to see if I lose overall grip with the stock bar.