Yukon Gear and Axle manufactures the highest quality and widest selection of performance axles in the market. Yukon uses the latest in heat treatment technology and high quality alloys to maintain our competitive edge. In-house engineering and quality labs ensure every axle is of the highest strength and standards for track racing, boulder climbing, desert racing, sled pulling, or whatever moves you forward. Yukon's 4340 chromyl axles are up to 37% stronger than other aftermarket axles and come with a lifetime .