PFF5-5401GBLK is made using our Black 95A durometer material and supplied with outer shells to increase bush stiffness by 300%, controlling longitudinal wheel movement under braking and cornering, and improving longer-term durability. It performs as the non-adjustable bush and allows for +/- 0.75 of caster adjustment, improving turn-in and steering feel, and correcting any steering pull. Combining our Polyurethane technologies with our in-house CNC machined stainless steel sleeve allows for easy on-car adjustmentsUsing 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