new in package verify that the part number is right for your vehicle before purchasing. it says on the package handwritten diesel 6.0. this is not true it will not fit that engine which is why im listing it because it wont fit mine. thanks for the viewing and have a great day! The Dayco Poly V Belt is a high-quality serpentine belt designed as an automotive replacement part. With manufacturer part number 5060660 and a V belt style, this product is designed to provide reliable performance for your vehicle. As a trusted brand in the industry, Dayco ensures that this belt is built to last and withstand the demanding conditions of your car or truck.