The exhaust system market is dominated by a limited number of international players, including Tenneco Automotive, ArvinMeritor, Faurecia and Bosal. Increasingly, these companies have to operate on a global scale. There are still a few small manufacturers in existence, but as range proliferation continues these smaller operations are faced with the decision to sell out or disappear altogether. This article is based on some of the market research included in a just published just-auto report.