American Star 100% Liquid Injected Delron “Self Lubricating” Yamaha A-Arm Bushing's Includes One Full Set of Bushings to Fit All Four A-Arms This Replaces Original Yamaha OEM Part Number 90381-15088-00. These Bushings Fit The Following Yamaha ATV Sport Quads: Blaster 200, Raptor 125, Raptor 250, Banshee 350, YFZ450, YFZ450X, YFZ450R, Raptor 660 and Raptor 700. Your Kit Will Contain: 12 Precision American Star 100% Liquid Delron Injected A-Arm Bushings (Depending On the ATV Model). These Liquid Precision Mold Injected bushings are superior to other companies machined Delron, Delrin and Nylatron Polymide Bushings. The tolerances on our bushings NEVER vary. They are always exactly the same! Machined bushings are subject to both machine and setup errors. Measure a machined bushing and you will find that none of them are exactly the same. Additionally most other bushings are a mixture of the main material and lower grade plastics. Our Bushings are 100% Delron and we never sacrifice quality to make an extra buck! Over the last 14 years we have sold over 2 Million of these bushings and never had one come back. This product speaks for itself!