This is a genuine AAM driveshaft boot kit for the slip yoke in the rear driveshaft at the carrier bearing. This fits GM and Dodge 3/4 and 1 ton applications from 2003-2018. This boot only fits the AAM driveshaft (9 Ribs). Please be aware that Dana made some of the factory drivelines for these trucks as well (10 ribs). Shipping is FAST and FREE in the continental U.S.