The Momentum GT intake is designed around an oil-free, large 9″ oval 360 degree radial flow performance air filter with 3-layers of progressive finer porosity synthetic media providing maximum convenience. The unique air filter to housing interface (patent pending) allows for maximum filter size which increases the available air volume while simplifying the installation process. The air filter is wrapped in reinforced metal providing maximum strength to prevent filter collapse. Also included is a Magnum SHIELD Pre-filter to protect your performance air filter from debris, repel water and keep your air filter cleaner, longe.