The system and method for augmenting searching for data with public search engines, by submitting searches to special purpose search resources, such as search capabilities provided by private companies, universities, government web pages, and the like is described. MPM candidates can be adaptively added on the basis of the directionality of valid MPM candidates. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The upper substrate faces the lower substrate.