The Acerbis Chain Guide / Slider Kit is the perfect solution for replacing the high-wear area of your bike's drivetrain. Includes: Acerbis Chain Slider: Quality replacement for the stock swingarm-mounted chain slider. Meets or exceeds O.E.M. specifications. Acerbis Chain Guide Block: Easily replaces the entire O.E.M. unit and ensures durability and high resistance to shock and wear from the chain. It is made of two parts that allow installation without removing the chain.