The Atro 21-1/2" Polyurethane Torque Rod Bushing is designed to provide superior stability and support to the torque rod. This fixed style bushing is made from a durable polyurethane material that is designed to withstand the toughest conditions and provide superior performance. The part dimensions are 21-1/2" c-c, making it the perfect fit for your Mack. With this bushing, you can rest assured that your torque rod will be secure and stable, allowing you to drive with confidence. FleetPride is your First Click in Heavy Duty®.