APR's Wheel Spacers physically move the wheel further away from the hub. In doing so, they give your wheels the desired offset needed to create the stance or look you desire, or clearance necessary to clear brake calipers. When using wheel spacers, longer bolts are required.
Please note, we provide a chamfer on our wheel spacers so they can fit on the factory chamfered hubs. Because of this, the inner diameter on this spacer will actually be larger than the specified amount. However, you still need to choose the correct center bore for your application, (57.1 mm or 66.5 mm). Due to B9 chassis design, spacers less than 7mm are not hub centric.