When swapping an 06+ Dyna over to chain drive the chain will often contact the passenger peg mount and sometimes the inner primary while riding. This will cause a grove to be warn in the aluminum peg mount, premature chain wear and some funny noises at times. With this chain slider, the chain will contact the delrin block instead of your aluminum parts when your suspension is in rebound. The slider is a bolt on solution that attaches to the front bolt of the passenger peg mounting bracket.