Introducing our new upgraded rear driveshaft, designed specifically for 2013-2018 Ram 3500s with the crew cab, diesel engine, AS69RC transmission, and 8' box. Our engineers have completely redesigned the factory shaft to deliver improved performance, durability, and reliability. With nearly 2X the thickness of OEM and over 50% greater strength, this model is built to handle even the toughest conditions. Constructed from heavy duty, light weight, 5" aluminum tubing, this driveshaft is engineered to increase horsepower and improve fuel economy. It is electronically balanced at high speed, 1,000 RPM, and built using only the finest new parts in our Grand Rapids, Michigan facility. To give you peace of mind, this product comes with a 1-Year Unlimited Mile Warranty. If you have any questions or concerns about fitment, our expert team is always available to help.