The stock eccentric bolts provided by Nissan for small camber/toe adjustments tend to slip under high cornering loads, causing changes to the rear alignment. SPL eccentric lockout 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 T6061 aluminum and supplied with CAD plated grade 10.9 hardware for absolutely zero-slip.