Fitment Information Acura TSX 2.4L L4 Gas (2004, 2005, 2006, 2007, 2008) Emissions Compliance Emissions legal in all 50 States Specs & Features Designed to increase horsepower Washable, reusable, and engineered to last for the life of your vehicle Designed to provide high airflow and exceptional filtration Engineered to fit easily into your factory air box 10-Year/Million Mile Limited Warranty Only needs cleaning every 50,000 miles under normal highway driving conditions Emissions legal in all 50 States Will not void vehicle warranty Product Description K&N® washable, reusable High-Flow Air Filters„¢ feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N's most popular product!Redline360 sells only genuine and authentic K&N performance products.