The K&N 57S Performance Airbox replaces the original airbox with a fully enclosed, purpose-designed, injection moulded airbox and K&N high flow filter.Aerodynamically designed to increase airflow and reduce turbulence, providing guaranteed horsepower gains with a K&N replacement air filterSpecifically designed to use original airbox mounting points so no additional hardware, cutting or drilling is requiredEasy to install, usually in 90 minutes or lessK&N Million Mile Limited WarrantyFully complies with the latest TUV emissions and sound regulationsThe enclosed airbox means cool air is retained and fed to the engine without external heat sources affecting inlet temperatures. The 57S air intake systems include either a custom engineered panel filter or an oversized conical filter specifically designed to increase, smooth and straighten air flow - allowing maximum cool air into your engine for more usable power and acceleration over the full engine RPM range. By reducing both the air filt