The Q300 offers a more subdued tone and look from the N1 systems. It uses the same 70mm madrel bent piping, but exits through either dual or a single Q300 muffler. It will offer a sporty tone, but will not be obnoxiously loud. This is definitely the choice for those looking to stay under the radar a bit and not draw too much attention. The single system will be lighter and slightly louder. The systems include all hardware and are direct bolt ons.