Does your BMW feel loose in the corners? The original rubber bushings on the E9X and E8X platforms degrade over time, leading to wheel hop and poor alignment. Upgrading to Strongflex Red (80 ShA) for street use or Strongflex Yellow (90 ShA) for track-focused builds is the single best way to restore that "Ultimate Driving Machine" feel. Pair these with our braking upgrades for a chassis that can handle the power of a tuned N54 or S65 engine. Stop wheel hop and vague steering feel with our polyurethane upgrades.