This filter features three layers of oil-free synthetic media and requires no oil during maintenance to provide maximum convenience. Its progressive layering provides great filtration efficiency and dust holding capacity. This media is best suited for street use. Pro DRY S filters are easily recharged with aFe POWER CLEANER. Constructed of 4-ply reinforced silicone, this intake tube is resistant to cracking and hi-temp conditions. With a smooth interior surface, this tube upgrade is engineered to increase horsepower, torque and airflow by reducing turbulence. Stainless-steel clamps for strength and durability.