4. Thicker rear sway bar. It is supposed to help by keeping the high-side rear tire down which means more traction on the back. That equals less over-steer.
I'm gonna disagree with this one as a potential fix. He already has too much rear rate. Adding more will make it worse. Handling results sometimes are inverse from what you would logically think
Ok, no offense taken. It was explained to me a different way.
