The most critical yet least expensive component in the engine's valve train is the valve lock. An improper fit between the retainer and lock will most often lead to failure. Precision Products Performance Center checks critical dimensions on every single part. We not only provide our customers with a more reliable part but also offer them a lock with the most consistent stack heights available anywhere! We can offer a standard range of sizes but we can custom manufacture to your specifications as well. Show us your application. Whatever you need in a valve lock, Precision Products Performance Center can make it and make it better.