MAD B58 High Flow Air Intake w/ Heat Shield - F22 M240i | F30 340i | F32 440iNOT FOR SALE IN CA. The MAD B58 Intake is a high performance air intake system designed specifically for BMW B58 engines. It is engineered to provide improved airflow to the engine, resulting in increased horsepower and torque, better throttle response, and a more aggressive engine sound. Made from high quality materials, the MAD B58 Intake features a mandrel bent aluminum intake tube that is powder coated for durability and visual appeal. The intake