One area where these axles gain a ton of strength is in the improved CV joints. The Gforce units are custom-built in-house and utilize 4340 heavy-duty CV cages. They are then subjected to a special aerospace heat treat process for added strength. The axles are also modular and the parts between the 4340 and 300M axles are interchangeable. This makes doing upgrades easy, and if you happen to damage an inner stub it can be replaced for around $150 instead of having to buy an entire stub assembly.