These set of 4 pieces proper branded hubcentric wheel spacers we use frequently on our Wraptor projects cars, not only do they give the car a good stance with the wider wheel track, but they also improve cornering handling abilities. These are quality German made spacers that centralise the wheel correctly unlike cheaper alternatives. We have never found these spacers to wear out any other components prematurely such as wheel bearings. These parts should be installed and torqued to the manufacturers specifications. Designed to fit Standard 2006 onwards Jaguar XK wheel, tyre and hubs perfectly. May fit aftermarket wheels too. If you have non-standard wheels/tyres sizes then please measure your car to check it can accommodate these wheel spacers before purchasing. If desired, we offer a fitting service at our work shop located B496EH United Kingdom.