COMP Cams® Titanium Retainers are American made from the finest 6AL4V alloy for maximum stiffness and minimal warpage. The 6AL4V alloy is heat-treated and processed to a stringent tolerance; it has to be since it is used on the U.S. Air Force F-117 Stealth Fighter. Other manufacturers purchase titanium from metal brokers and produce “cheap” retainers, but COMP Cams® titanium retainers will not deform. From a standing idle to the most extreme rpm, our titanium retainers perform flawlessly, without compromise.