aFe Momentum HD Pro DRY S Stage 2 Intake System 11-16 GM Diesel Trucks V8-6.6L (td) LMLThe Momentum HD is designed around a massive Pro DRY S performance 360 degree radial flow air filter with 3 layers of progressive synthetic media providing 99. 2% cumulative efficiency. The unique 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