The Eventuri FK8 silicon hose is designed specifically for the Eventuri FK8 intake system. It replaces the stock hoses which connect to the alloy inlet tube for the turbo. The silicone hose allows for a smoother airflow part to the turbo from the intake. It also features an internal step which is matched to the stock alloy tube and thus eliminates the exposed edge of the tube which is apparent when using other aftermarket silicone hoses. To be used on the Eventuri FK8 Civic Type R carbon intake systems made before 2/15/2019. Intake purchased after this date will have the new silicone hose included.