This is the replacement weld-on center piece (steering shaft end) only for our original Elliptical Quick-Release Steering Wheel Hub (Part No. 3419-001, available until 2011). Use this replacement to move your hub to a new car, or when replacing your steering shaft. Steel slug has a 20mm (0.78") OD and 12mm (0.47") ID for welding to your steering shaft.
Note: Does not fit our current OMP bolt-on elliptical quick-release hub (Part No. 3426-302).