This radiator overflow tank is made for the Mercedes-Benz 126 500 1549 W126 from 1985 300SD. It is an OEM used item that has been 100% leak tested and requires no drilling or modifications for installation. The mounting style is bolt-on and the material used is plastic from Germany. This expansion tank is a vintage part and is not considered a performance part. It is not a universal fitment item and is designed specifically for the Mercedes-Benz 126 500 1549 W126 from 1985 300SD. Purchase with confidence knowing that this item is designed to fit your vehicle perfectly.