The Takeda Momentum Pro Dry-S intake is essential when upgrading the performance of your Civic Si. This system outflows the factory intake, while allowing the car to breathe and perform to its greatest potential. The Pro DRY S Filter is made of a 3-layer synthetic media, providing additional air flow and filtration. The Pro DRY S is convenient, as it requires no re-oiling when being cleaned. Takeda Momentum Cold Air Intake System w/ Pro DRY S Filter Honda Civic Si 17-20 L4-1.5L (t) Honda Civic Si 17-20 L4-1.5L (t)