Which rear sway bar is everyone using? a. 22.5mm toyota/scion part. b. 25mm hotchkis bar I saw that the a. option is about $240 and the b. option is about $133. But I did some calculations and the hotchkis bar is about 50% stiffer. Is this a terrible idea with the oem FSB? Also if you're selling a used oem RSB let me know.