"Syncro Drive Line - also known as Prop Shaft. These are custom hand built, precision dynamic balanced drive shafts. Built with top quality US components (no China or other foreign components). This is a telescoping style drive line with premium Dana-Spicer brand u-joints (part number 5-785x). These have heavy duty yoke that can be rebuilt with new u-joints if needed in future (yoke is sturdier and can handle new u-joints being pressed in - originals were prone to distort or stretch). "