This Black Mamba turbo inlet pipe fits directly on the B58 engines of the BMW 140i, 240i, 340i, and 440i F-series, replacing the original resonator. With a 25% greater volume than the stock part, a high-quality 6061 aluminum structure, and a discreet black finish, this inlet is the perfect upgrade to enhance airflow in the intake system, supporting high power and pressure without the risk of breakage.Direct mounting 3.75″ / 90mm diameter High-quality 6061 aluminum construction Specific sound enhancement High-flow design for improved performance Black finish for a sleek look Lifetime warranty.