Fits - 2003-2009 Dodge Ram 2500/3500 ** U-Joint Used - 5006813 (1485 Series) Upgrade your AAM 9.25 to these chromoly shafts with this kit which includes 33 spline Chromoly inner and outer shafts. Not all chromoly shafts are alike. SAE-4340 nickel chromoly axle shafts are engineered to exceed OE standards and meet the exacting demands of off-road. Hit the trail with the confidence that comes from knowing you are backed by the global leaders in driveline products. Designed to deliver added strength and durability, these genuine Spicer axle shafts are one more example of the innovations that we bring to performance applications. Spicer nickel chromoly steel axle shafts offer these features and benefits: SAE-4340 nickel chromoly steel construction For ideal hardness throughout the part Nickel provides additional toughness Chromium ensures high-temperature strength and resistance to abrasion Molybdenum helps maintain a specified hardenability Heat treatment processes Delivering the same surface hardness and case hardness, while achieving a higher core hardness for greater strength Ensuring optimal hardness inside and out Optimized for high-performance strength and durability Designed to withstand off-road punishment.