Improve the performance of your Jeep Wrangler JK's suspension system with this Rancho forged end featuring Rancho's D2 bushing. Made of durable polyurethane for long life, it has damping qualities that reduce noise, vibration and harshness. Product Features:COMPATIBILITY -- Replacement bushing for Rancho RS66157B upper rear adjustable control arm for Jeep Wrangler JKQUIET PERFORMANCE -- Firmer inner bearing material and softer outer material improves damping qualities to reduce noise, vibration and harshnessMAINTENANCE-FREE BUSHINGS -- Features Rancho's D2 high-articulation, grease-free, self-centering bushings that have a PTFE liner in the internal bushing that serves as a lubricating agent for long-lasting, maintenance-free operationENGINEERED TO LAST -- Made of durable polyurethane for long life