PN 7010 – VW Replacement Torsion Center. This part is a weld in center that replaces the stock Swing Axle or IRS VW rear section center spline. It is used for new chassis building and to replace stripped out or worn stock torsion centers. It is made from 1018 steel, is 2″ in diameter and has the standard 40 tooth inner spline. Simply cut out your old torsion center and weld in the new one. Take a look at our Quick Adjuster PN 7000 for a weld in adjuster.