Two polyurethane arm inserts upgrade the factory dog bone mount to reduce motor vibrations. Helps reduce wheel hop and traction loss, delivering more consistent power delivery to the wheels. Polyurethane inserts are stronger and longer lasting, outperforming the factory rubber bushings. Manufactured by approved facilities using materials that meet or exceed strict requirements. Key attributes Function: Vibration reduction, improved traction, and more reliable power transfer. Compatibility: Designed to fit standard factory dog bone mounts. Material: Polyurethane for enhanced durability. Performance: Greater rigidity and wear resistance compared to factory rubber bushings. Use scenarios Offroad or traction driving on rough surfaces where wheel hop is common, helping maintain grip during acceleration. torque launches or aggressive throttle application to achieve more stable power delivery. Replacing worn or aged rubber bushings in the arm mounts to restore performance and extend component life. Notes Includes 1 pair of inserts designed for standard dog bone mounts. Quality manufacturing ensures materials meet strict requirements for reliable operation.