A cylindrical part, sometimes constructed from supplies like aluminum or strengthened plastic, designed with a selected internal diameter facilitates the motion of ambient air into an engine. Its dimensions are engineered to optimize airflow traits for a specific engine displacement and efficiency targets. This half replaces factory-installed ductwork, typically exhibiting a much less restrictive design.
Implementing this aftermarket half can result in enhanced engine efficiency by way of elevated air quantity and decreased inlet temperatures. The precept includes delivering a denser cost of oxygen to the combustion chamber, which, when appropriately matched with gasoline supply, can lead to higher energy output and improved throttle response. Early iterations targeted totally on decreasing airflow restrictions; trendy designs typically incorporate warmth shields and placement methods to attenuate thermal soak.