Our SPL FKS monoball shock bushings for the rear knuckle replaces 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 SPL 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 T6061 aluminum bearing shell provide an accurate fit. Sold as a pair. Made in the USA. Applications: 2003-2008 Nissan 350Z (Z33) 2003+ Infiniti G35 Sedan & Coupe (V35) 2008+ Infiniti G37 (V36) 2009+ Nissan 370Z (Z34) Note: This kit consists of the shock mount bushings only. Shock mount bushings are included with our complete rear knuckle bushing kits.