The stock eccentric bolts provided by Mazda for small camber and toe adjustments tend to slip under high cornering loads, causing changes to the rear alignment.  Our SPL Parts Eccentric Lockout (EL) kit eliminate the stock eccentric bolts to keep your rear alignment where you set it. You must have adjustable control arms in order to adjust camber and toe after eliminating the stock eccentric bolts.  Our lockout plates are CNC machined from 6061-T6 Aluminum and supplied with zinc plated bolts and lock nuts for absolutely zero-slip.  One kit includes washers and bolts for both camber and toe arms. Sold as a complete kit for one car.Made in the USA.  Applications:  2006 - 2015 Mazda Miata MX-52003 - 2012 Mazda RX-8