Powerflex Front Radius Arm To Chassis Bush PFF5-401PFF5 401 Front Radius Arm to Chassis Bush uses our Black 95A material and is supplied with steel outer shells for better load distribution, offering improved durability and braking stability and a 140% increase over the worn rubber bush. Over the years we have seen a shift in the use of cars such as theBMW E92 M3 andE82 1M Coupe, with more of their time being spent on track and the power, chassis and braking modifications carried out, taking them from