These Titan Wheel Accessories 5mm hubcentric wheel spacers are designed with a 5x120 bolt pattern and 74.1mm hub bore for BMW E39 5 Series 525i, 528i, 530i, 540i, X5, X6. They are machined from T6 6061 billet aluminum, making them both lightweight and durable. These spacers will improve the stance of your vehicle, providing a more aggressive look while also adding additional clearance for aftermarket brake and suspension parts. They also allow for larger wheel and tire combinations to be installed, giving you more options for customization.