PFF69-102GBLK - Powerflex Geometry Adjustable Component (GAC), Caster adjustable bush. Adjustment range +/- 0.33 deg PFF69-107BLK - For Legacy/Outback Models With Pressed Steel Lower Arms Only PFR69-616BLK - Made in our Black 95A Durometer Polyurethane, it is supplied with a steel outer shell for stiff and durable longitudinal control of the rear axle under acceleration and braking, with an articulating design to retain the factory-specified geometry change during cornering.