USA Standard Gear driveshafts are built new from the ground up, not remanufactured, to provide decades of reliable use. Many components are upgraded from OEM to eliminate known issues. Length 86.25 Flange To Flange New universal joints, slip yokes, shafts and components ensure a long life All units are dynamically balanced at 3,000+ RPMs for vibration-free driving USA Standard Perfect Fit drive shafts are guaranteed for proper fitment and easy installation USA Standard Driveshafts are strengthened over common Oe shafts to prevent Oe failure Brand new and fully assembled for simple out-of-the-box replacement Features and Benefits: Length 86.25 Flange To Flange New universal joints, slip yokes, shafts and components ensure a long life All units are dynamically balanced at 3,000+ RPMs for vibration-free driving USA Standard Perfect Fit drive shafts are guaranteed for proper fitment and easy installation USA Standard Driveshafts are strengthened over common Oe shafts to prevent Oe failure Brand new and fully assembled for simple out-of-the-box replacement Details: AAP UDA 4: 85 Compressed Length: 86.25 inch End 1 Type: 4 Bolt Flange End 2 Type: 4 Bolt Flange Freight Class: UDA 4 Grade Type: Regular Shaft Material: Steel Universal Joints Included: Yes Application Summary: 2010-2013 Acura Zdx Base (Rear) (Drive: AWD / Qualifier: with 2 Piece Rear Driveshaft) 2010-2013 Acura Mdx Base (Rear) (Drive: AWD)