K&N has designed a performance air intake system for the 2009 Mitsubishi Lancer 2.4L/2.0L. K&N dynamometer tests show a 6.73 horsepower gain at 5100 RPM with use of this K&N air intake modification. K&N tests multiple vehicles for each air intake system it makes to ensure a consistent horsepower and torque gain. This video demonstrates the steps needed to install a power gaining K&N air intake into 2009 Mitsubishi Lancer with the 2.4L or 2.0L engines. http://www.knfilters.com/search/product.aspx?Prod=69-6544TS