Sorry, it's actually Ferrea
Here's the description from their website
"Ferrea super alloy valves... represent the highest level of sophistication in valve technology. We proudly introduced the next generation of extreme heat resistant valves, specifically developed to withstand the brutal punishment of NHRA Top Fuel and Funny Car applications. We have developed a specially processed high nickel-based alloy, and a unique heat-treatment process, which yields extreme heat resistance and enormous tensile strength properties, (far beyond conventional Inconel materials).
These extraordinary valves will set the standards for all Supercharged, Turbocharged, Nitrous Oxide, Off-Shore Marine or 9.0 compressin restricted race motors. Many Top Fuel Dragster and Funny Car teams can confirm the performance and reliability of these new valves which are now available for many engine combinations including NASCAR, Sprint Car, Drag Race, and Off-Shore Marine applications.
We have expanded our offerings for the Top/Fuel and Funny/Car applications with a Super Alloy Valve available for every after-market head in both 11/32 & 3/8-stem sizes."
They were reasonably priced also. I bought mine last year through Flatlander racing for $220 shipped to my door.