Large Three Layer Performance Air Filters:_x000d_Dual 360-degree radial flow air filters feature our oil-free Pro DRY S media with three layers of synthetic media for maximum convenience. Their progressive layering provides great filtration efficiency and dust holding capacity, while not requiring the use of oils. This media is best suited for street use. Their inverted tops make for more filter surface area, resulting in longer service intervals.

Product Features:

• With exposed hardware and a motorsport inspired design, this Stage-2 Si's aggressive dual air filter design is sure to draw attention.
• Dyno-Proven Gains up to +15 HP & +13 Lbs. x Ft. TQ
• Outflows Factory Intake by 7%
• Measured Flow: 580 CFM @ 7" H2O