MSW’s Take: the stock inner bushings located on the upper aluminum (steel in E36) are very soft and compliant and create unwanted geometry changes in race/track use. They’re also difficult to replace. We always replace them with these bushings from Powerflex when rebuilding rear subframes.
These bushings replace BMW number 33321092247.
Fits all E36 (excluding compact ti), E46, and Z4 models.
Sold as a pair.