Shifter systems are built with tight tolerances in mind for minimal slop. Overtime, the cheap OEM bushings in the shifter turret can wear and create a loose feeling. The Miata is well known for needing a shifter rebuild at high miles. The Cusco shifter collar sits at the bottom of the turret and receives the bottom ball joint of the shift knob. This precision piece will restore the factory crispness of your shifter and keep you enjoying your roadster for years to come. Installation can be done with hand tools relatively easily.