Cleenaire CAF184 The Most Advanced Protection Against Bacteria Dust Viruses Allergens Gases Odors, Cabin Air Filter For Cadillac, Buick, and Chevrolet SEVEN STAGE PROTECTION- Providing The Highest Overall Contaminate Capture Rate Of Any Cabin Filter In The Market DOUBLE SIDED ACTIVATED CARBON And BI- Directional Design Eliminate The Dreaded Airflow Arrow REINFORCED FRAMING AROUND THE ENTIRE PERIMETER Provides Unmatched Stability And Sealing To Prevent Contaminated Air Bypassing The Filter NO MORE BREATHING EXHAUST FUMES FROM THE CARS AHEAD Get behind a diesel truck, you no longer smell the exhaust, WHICH MEANS YOU ARE NO LONGER BREATHING IT IN. Thanks To The Highest Grade Double Sided Activated Carbon. This Filter Is Made For Those That Care About The Air They And Their Passengers Breathe- NOTE: DOES NOT FIT IMPALA LIMITED Our filters use a DOUBLE SIDED ACTIVATED CARBON with a BI-DIRECTIONAL design to eliminate the dreaded airflow arrow and the guesswork that goes with it. REINFORCED FRAME STRUCTURE around the entire perimeter, providing extra stability - allowing no room for contaminates to bypass the filter. Using a patented SEVEN stage filtration process, the overall contaminate capture rate is UNMATCHED by any filter currently on the market! NEW HIGH AIRFLOW DESIGN allowing air to flow at a high rate out of your vents. Harmful gases (Exhaust Fumes, Carbon Monoxide.. ect) Chemicals Vapors Cigarette Smoke Allergies Particle Matter Endotoxin Bacteria Virus Volatile Organic Compounds Plus hundreds of other contaminates that can be damaging to your health.