Powerflex Lower Torque Mount Insert For Toyota Yaris GR (2020+) Black Series PFF76-920POWERFLEX Powerflex Lower Torque Mount Insert For Toyota Yaris GR (2020+) Black Series . Part number: PFF76 920 Bush size is . Quantity in the pack is 1. Does not fit the GKN differential with 41mm front bushes as fitted to vehicles pre 1997. . Our POWERFLEX PFF76 920 Lower Torque Mount increases the stiffness of the OEM powertrain mounts using our yellow 70A material.