TEGIWA Subaru GDB Airbox is a proven design, manufactured from Carbon Fibre. Gives excellent performance gains over OEM GDB setup and an immense induction noise. The kit also looks great in the engine bay! It is supplied complete with all fixings/brackets for an OEM quality fit. The filter is cotton mesh and should replacement filters be needed in the future we will always have them in stock. This intake is likely to give you between 15bhp-25bhp with mapping. To install this airbox you will need to modify your original scoop as seen in the picture.