Volvo S40 2005-2008 » K&N Typhoon Intake

Built for performance and style, the Typhoon intake system is a free-flowing mandrel-bent aluminum tube induction system designed to fit your S40, V50, C30 Volvo from 2004.5 and on. This intake is designed as a short ram intake which helps reduce the total length and restriction of the factory air intake system. This results in better tip in throttle response and increased power throughout the boost range. With an oversized High-Flow conical air filter designed to provide increased surface area and dust capacity, this extra surface area provides even more airflow at lower restriction than a standard K&N O/E replacement filter that is limited to the size of the factory air box. The oversize air filter also captures more dirt increasing the service life before a cleaning is required (up to 100,000 miles). See the K&N Dyno chart for typical power gains with this product.

http://www.kandn.com/dynocharts/69-9000.pdf