Cosworth Air Filters - Subaru Impreza WRX STi

Cosworth High Flow Synthetic Air Filters are constructed from a proprietary synthetic, non-woven single layer, pleated polyester filter media that requires no oiling. For an OE-like fit, the filter housing is injection moulded from high impact polystyrene or polypropylene. Each Cosworth air filter has been engineered to fit the vehicles original air box providing a true cold air supply to the engine. Cosworth Performance Air Filters also provide increased air flow when compared to original equipment air filters.