PFF5-5401 is  made using  our Black 95A durometer material and supplied with outer shells to increase bush stiffness by up to 300%, controlling longitudinal wheel movement under braking and cornering, and improving longer-term durability. Using POWERFLEX PFF5-5401G provides a longer tyre life, increase handling of the car and  braking stability is also improved.  The POWERFLEX PFF5-5401/5401G are 300% stiffer  than the OEM  bush