aFe Momentum HD Pro 10R air intake systems are designed to give your Cummins, Power Stroke, or Duramax the air it demands. All Momentum HD systems are application-specific, dyno-tested, and tuned to provide maximum horsepower and torque. The Momentum HD Pro 10R intakes are designed around massive, 1,000 cfm, 360 degree, radial-flow air filters with ten layers of progressive cotton media providing 99.59 percent cumulative efficiency (independently tested). Their unique air filter-to-housing interface allows for maximum filter size that increases the available air volume while simplifying the installation process. In addition, the air filters are wrapped in reinforced metal providing maximum strength to help to prevent filter collapse.