Sixty61 offers a whole line of swingarm extensions to fit all the most popular Honda CBR models. These swingarm extension blocks allow you to stretch your sportbike 4-6 inches quickly and easily without permanently altering your stock swingarm, allowing you to remove the stretch if you so desire with no adverse effects. Most kits are available in polished aluminum, black anodized and triple chrome finishes. Fits Honda CBR 1000rr, 600rr, F4i, 954, 929, and 900rr models.