The POWERFLEX REAR SUBFRAME REAR BUSH PURPLE is a polyurethane insert, by Powerflex for BMW F20 F21 F22 F32 F33 F36. These are a great addition to any BMW build and an excellent low-cost improvement.
PFR5-422 is a full replacement bush. For inserts that fit into the OE bush use PFR5-421 for 33316758260 or PFR5-1921 for 33316792510.
