The information below is per-pack only [Vehicle Fitment]: CA10234 Compatible with Nissan Versa 2007-2010, 2011 1.6L, 2011-2012 1.8L, NV200 2013-2021, Cube 2009-2014; INFINITI Q50 2014-2015, 2016-2018 3.5L; Chevrolet City Express 2015-2018 [3-Stage Progressive Density Media]: At the core of the PT engine air filter is an advanced nanofiber hybrid media, engineered for unrivaled performance. The outer layer traps large debris, the middle layer reduces fine dust, and the inner safety layer blocks ultra-fine particles. This multi-stage process guarantees exceptionally clean airflow, providing the highest level of protection for your engine's critical components [Improved Fuel Economy]: Cleaner intake air improves the efficiency of the fuel combustion process, which improves fuel economy and reduces emissions. A well-maintained air filter is critical to environmental protection and economical driving [Installs in 5 minutes]: OE design for direct installation. No special tools or modifications required. Self-installation is easy and convenient [Suggestion for Replacement]：Replace every 12 months or when it drives to 12,000 miles. If you often drive in heavily polluted areas and muddy roads, it is recommended that you replace them frequently to keep the air fresh in the car Brand Name PHILTOP Unit Count 2.0 Count Manufacturer PHILTOP Model Number CA10234 Item Type Name CA10234 Engine Air Filter Manufacturer Part Number 4520EAF082QUS