K&N COLD AIR INTAKE TO SUIT OPEL ASTRA PJ A14NET TURBO 1.4L I4This K&N high performance Typhoon cold air intake system is a free flowing, mandrel bent aluminium tube air induction system. The restrictive factory air filter and air intake housing are replaced by the K&N Typhoon air intake which is designed to dramatically reduce air flow restriction as it smooths and straightens air flow. This allows your engine to inhale a larger amount of air than the factory air intake. More air means more usable power and