PUREFLOW 2025 Cadillac XT4 Cabin Air Filter with HEPA and Antibacterial Technology, PC4211HX 228i xDrive Gran Coupe 2020-12 Chevrolet Sonic 1

2020-12 Chevrolet Sonic 1

1998-94 Saab 900 2

2022-19 Porsche 911 3

2016-14 BMW M235i 3

2020-19 Freightliner Sprinter 4500 3

PUREFLOW 2025 Cadillac XT4 Cabin Air Filter with HEPA and Antibacterial Technology, PC4211HX 228i xDrive Gran Coupe 2020-12 Chevrolet Sonic 11st Stage: For drivers and passengers who suffer from severe allergies, PUREFLOW HEPA (High Efficiency Particulate Air) offers 99. 97% efficiency, capturing microscopic pollutants including pollen and other allergens (may result in a minor restriction to airflow). 2nd & 3rd Stage: Activated charcoal adsorbs harmful gases like carbon monoxide and sulfur dioxide. This layer is combined with baking soda to absorb bad odors. 4th Stage: Advanced