Fits All 2K+ models! Lightweight 2k Back Block from KAPP (offset hole). Looking to speed up your cycle time? Here"s a great mod which not only looks good, but adds to your performance. Not only a must for electro Cockers but also a considerable upgrade for mechanicals. Weighing in at about half as much as the same design in aluminum, this block can actually allow your E-Blade or Race Frame to run about 10% to 15% faster! Easy installation.