The Mercedes-Benz 2.0T M133 engine comes equipped with a well-engineered stock airbox, but it also features a built-in reducer at the air filter outlet that restricts airflow to the turbo inlet. To eliminate this limitation and achieve a 20hp gain on a stock engine, Black Mamba offers this high-performance intake kit. It includes a large-diameter aluminum flange adapter, a multi-layer synthetic cotton high-flow air filter, and all necessary components for installation.By retaining the lower portion of the factory airbox, this Black Mamba intake increases airflow by 140% while maintaining a subtle appearance and producing an aggressive sound—all at an exceptionally competitive price!Direct-fit installation Black-finished aluminum adapter Dyno-proven gains of 20hp on a stock engine Washable high-flow synthetic cotton air filter 140% more airflow compared to OEM Enhanced engine sound Integrated heat shield Complete installation hardware included.