An air induction unit is composed of an air filter, a resinous intake manifold for inducting air filtered by the air filter into intake ports of the engine, a resinous case and a resinous cap. The air filter, intake manifold and fuel injectors are disposed inside the resinous case and the resinous cap....http://www.google.es/patents/US6024188?utm_source=gb-gplus-sharePatente US6024188 - Air induction unit for internal combustion engine
