PUR exclusive enhanced HVAC filters up to 99.7% of dust, pollen and contaminants, PUR exclusive activated carbon weaves are USA-engineered to last up to 15,000 miles, 25% longer than standard performance of 12,000 miles, PUR filter use thick, industrial strength electrostatic media to trap even the tiniest of particles while densely packed activated carbon prevents gases and odours from entering the cabin, Road debris, exhaust fumes, and contaminants undergo filtration through a three-layer system, which includes a dust filter for trapping road debris, a particle-averting filter to block airborne particles, and an adsorption filter for absorbing exhaus, Contains soda combined with carbon cleans the outside air flowing through the ventilation system, Part Reference Numbers : 89909 XC35677C CF10364 CF1064 AFC1289 PC5677 C35677 24909, Kit Includes: 4x Cabin Air Filter, Kit Variations: K54-100009 K54-100150 K54-100462 K54-100659 K54-100769 K54-100928 K54-101087 K54-101246 K54-101405 K54-101564, Part Reference Numbers : 89909 XC35677C CF10364 CF1064 AFC1289 PC5677 C35677 24909