Don't just replace axle shafts, upgrade them. For less than the cost of an original replacement axle shaft, you can upgrade to an Alloy USA Performance Shaft made from 1541H or 4140 steel depending on application. Up to 35% stronger, each axle is heat-treated and induction hardened to have twice the tensile strength than stock. And the latest cold-rolling technology produces splines that are stronger than splines cut traditionally (no cuts mean no edges to create stress points that lead to fracturing). Each shaft has an exclusive 10-year warranty. Note: Axle shafts sold individually. Wheel bearings, seals, and wheel studs available separately.