I noticed that there was a rule change:
3.5. “Replaced” means that the item may be replaced with items meeting [strike][color=#ff0000]or exceeding[/color][/strike] OEM specifications.
So, how does this affect the bushing rule?
22.214.171.124. Suspension bushing material replacement is permitted.
I know a lot of people use poly, delrin, spherical/aluminum, etc bushings, but per the new rule, it seems like only rubber is legal?