3 inch Red Color Universal Inlet Air Filter High performance air filters are designed to achieve high, virtually unrestricted flow while maintaining filtration levels critical to ensure long engine life. Filter mesh is made of stainless steel will never corrode. Air filter cotton gauge is made of 4 to 6 layers of cotton and is washable, reusable. Filter top made of t-6061 aluminum and anodized. High quality steel clamp includes included. High air flow and excellent filtration. Designed to increase horsepower and acceleration.