This is Extream Rod 1 Only 4G63 22/28mm.
Oliver is devoted to extracting every last benefit from our U.S. alloy steel for our racers. From the very start of production, our material is processed using a higher standard for cleanliness and purity, meeting AMS 2301. Our proprietary two-stage heat treatment optimizes stress relief and provides su-perior grain structure and ideal grain size. We continuously strive to give our racers the ?nfair?ad-vantage. Oliver rods are better by design. All Oliver rods are precision-machined using only premium mill-certified aircraft quality E4340 AQ chromoly alloy, heat-treated to produce 100% martensite grain structure.