SPL Parts FKS Rear Knuckle Monoball Shock Bushings (RKS) replace the stock mushy rubber bushings with low-friction articulating spherical bearings, eliminating bushing flex and reducing bind/friction. This maintains optimum suspension geometry under load, to improve handling and feedback.Our FKS series Bushings feature FK Racing Bearings with a self lubricating Teflon liner for long life and maximum performance. Highly precise (machined to 1/1000th inch) CNC machined 6061-T6 Billet Aluminum bearing shell provide an accurate fit. Sold as a pair. Made in the USA. Application List: 1990-1996 Nissan 300ZX (Z32)Note: This kit consists of the shock mount bushings only. Shock mount bushings are included with our complete rear knuckle bushing kits. Installation Instructions: SPL Rear Knuckle Shock Bushings