Based in the Netherlands, BOS is a family business that has specialised in the design and manufacture of motorcycle exhaust systems for over 50 years now. All the developments and years of experience from the world of motorbike racing go into the production process. Only the best materials are used, together with state-of-the-art technology. In 1994, BOS became the first company to homogolate an absorption silencer in conjunction with a dB killer for EU approval. This system and the unmistakable muffled, throaty BOS sound is now available for many motorbike models.