This double cardan style CV drive shaft is recommended for Jeep TJ Rubicon models equipped with 4in - 6in suspension lifts to prevent driveline vibration and the rear output shaft from breaking. This drive shaft will flex to a nominal 30??s prior to binding and is a direct bolt in replacement that does not require removing the factory original out-put mass vibration dampener hub. It is built on a 2.5in tube diameter and uses the stock 1330 sized universal joint at the rear differential end and a massive 1350 CV head.