This allows for the flanges to properly align during installation to insure a leak free seal. -- Fit Flange ID size 2.0", Clamp size will bigger than 2.0", make sure the size right. [EASY ON, EASY OFF] - There are two flanges on both sides to ensure uniform force is applied to the V-belt clamp during use.A V-band kit allows you to connect or disconnect sections of your exhaust by removing a single nut.
eBay