Engine codes: For BMW & For MINI B38 A15A, B38 B15A, B38 K15A, B48 A20A, B48 A20B, B48 B20A, B48 B20B. for BMW B38 B48 B58 engines. Function:Valve Pressure Spring Installer Remover Tool Kit is used to remove and install the pressure spring on the middle lever without damaging the engine cylinder.