The aFe Momentum HD Pro Dry S 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. These Momentum HDs are designed around massive Pro Dry S performance 360-degree, radial-flow air filter with 3-layers of progressive synthetic media providing 99.2 percent cumulative efficiency. Their unique, patent pending, air filter-to-housing interface allows for maximum filter size to increase the available air volume while simplifying the installation process. The air filter is wrapped in reinforced metal providing maximum strength to prevent filter collapse. For those seeking easy performance upgrades for daily driving and occasional spirited runs, aFe HD Pro Dry S air intake systems are a perfect blend of power and performance, without compromising style. Features and benefits include: * Larger filter—more capacity * One-piece sealed housing uses factory mounting points for hassle-free installation * Large, clear sight window for hassle-free filter inspection and aggressive style * High-quality, CAD-designed, dyno-tuned, roto-molded intake tube to achieve maximum power gains while maintaining a perfect fit * Premium clamps and a silicone elbow coupling for flexibility and secure installation * Most systems are available with an auxiliary air scoop (sold separately) * Urethane plug included to block off the auxiliary air inlet and completely seal the air box * Ideal for extreme performance without compromising style