This swingarm was designed for use on stock 2008 to 2017 Harley Davidson Softail models. if you have an aftermarket frame you need the pre 99 Swingarm in most cases. This swingarm is heavy duty. The construction is sturdy & clean unlike some oddball tubular ones. Welds are beautiful.. The ends bolt on for ease of fit & adjustment... Feel free to contact us with any questions.