For racers looking to get the maximum amount of power out of their engines, Lunati Titanium Retainers are the way to go. With the greatest combination of high stiffness and light weight, titanium retainers are made from a premium 6AL4V alloy that is heat treated for durability and strength. Held to the highest tolerances to produce minimal warpage, titanium retainers are the ultimate for high performance, racing applications.