The K&N 69-0021TB Typhoon cold-air intake system is a free-flowing, mandrel-bent aluminum tube air induction system designed to fit some Acura TL models. The restrictive factory air filter and air intake housing are replaced by the K&N Typhoon cold-air intake which is designed to pull in relatively cooler air and dramatically reduce air flow restriction by smoothing and straightening air flow. This allows your engine to inhale a larger amount of denser air than the factory air intake. More air means more usable power and acceleration throughout the engine's RPM range. Air is directed through the cold air tube and into a short ram intake tube that leads into the engine's throttle body for a guaranteed power gain.