G-Force offers two axle packages: the top tier, made from 300M and priced at $1,799, is certified for well over 1,000 hp, while the other, 4340 alloy, is for Camaros making 1,000 hp or less. The main differences in the two are the materials used. Since we plan on staying under that magic 1,000hp mark, we went with their 4340 units, which run $1,599 for the pair. As the name implies, these axles are made from certified aircraft-grade billet 4340 and employ 4340 billet inner bolt-together axle stubs, 4340 billet axle bars, and billet 4340 outer stubs. All the material GForce uses comes from a 100-year-old U.S. steel mill, and all their machining is done in house.