Give your Sledge^® the ultimate driveline upgrade with these heavy-duty center CV (constant velocity) driveshafts. Made from hardened steel these upgraded driveshafts will satisfy the performance and durability needs of the most demanding drivers. Includes front and read center driveshaft assemblies. Driveshafts come complete and ready to install onto standard 9586 center differential output cups or the optional 9586X hardened steel output cups.