This is a genuine AAM pinion seal kit that includes the pinion seal, pinion sleeve, pinion nut, and pinion washer. This fits 2003 and newer Dodge Ram 2500 trucks with the 10.5 American Axle Manufacturing rear differential. Please note that not all 2500's had the 10.5 rear, some had the 11.5 rear. Shipping is FAST and FREE in the continental U.S.