Rear A Arm and Knuckle Suspension Bushing Kit - Both Sides - Heavy Duty Poly Bushings: includes 16-Poly Bushings, 12-Bearing Shafts, 8-Thrust Covers, 8-Sealing Washers. Replace your worn rubber OEM A arm bushings with upgraded Race-Driven poly bushings for more longevity and easier installation. Bushings necessary to replace both sides of your quad. Check the fitment chart for the year, make and model of your machine Race-Driven Rear A Arm and Knuckle Suspension Bushing Kit. You will receive as pictured, the necessary bushings to replace both sides of your quad. These heavy duty poly bushings are designed to replace the rubber bushings used in Yamaha utility ATV A arms and provide a much improved performance and life vs stock OEM parts. Race-Driven is committed to bringing the highest quality products to all riders at an affordable price. Customer Driven – Quality Driven – Race-Driven.