This standard size piston and OEM Authentic connecting rod is a direct replacement for various Dodge, Chrysler, Jeep, and Ram Pick Ups models from 2003 to 2008. The item includes a wrist pin and connecting rod, and the mounting hardware is also included. The piston is made of aluminum alloy and has a clean/used surface finish. Please note that this item does not come with bearings included, and the bore size is standard. The piston and rod assembly is a right or left fit, please specify what side you need. This item is not a vintage part, modified item, or performance part. The manufacturer part number is 53021538AD - 53021539AD, and the OE/OEM part number is also the same. The manufacturer warranty is not included.