Check the listing for details. 4" 10CM FRONT DOOR CAR SPEAKER ADAPTER RINGS For BMW E60 E61 E90 E91 E92 E93 E87. Color: Black, Condition: New. Listed at 33.47 USD. In addition to the great range of vehicle products we supply and fit, we are also able to offer a fully comprehensive engine remapping and tuning service for most makes and models of vehicle from cars to motorhomes. This service enables our customers to use their vehicles safely to their maximum potential. When your vehicle is running at its best you will be reducing your fuel bill as well as your carbon footprint. Our state of the art premises are conveniently located in Birmingham, which means our customers can reach us easily from all over the UK and we are also able to provide a comprehensive nationwide fitting service. Our hassle-free mobile fitting service means that you can enjoy the quality and service we provide without having to leave your own home. Everything we supply and fit c.