In order to ensure that your exhaust system is working as designed, Akrapovic require that you purchase an entire exhaust system from them.
Below the Item you have selected you may see a series of Required Parts and Optional Parts. In Order to purchase an Akrapovic exhaust item, you must first select a Required Part if there are any available.
Optional Parts are exactly that; optional.
If you have any additional issues or queries please to not hesitate to Contact Us.