This is a performance induction kit for the Ford Focus ST 225. This intake kit replaces the restrictive OEM air box. *Please note you will need to replace the ECU cover to fit this intake kit. You can purchase a full kit with ECU under part number - SR-225-RD-ECU* Features Ramair MAF safe dry foam filter with 1032cm2 surface area. Fits to all standard mounting points, no need for modification to your engine bay. 4-ply high quality silicone hoses. Easy to clean using our filter maintenance kit - CK-003 What Does It Do? Ramair SR induction kits are designed to eliminate the major sources of air flow restriction that your vehicle experiences from the factory intake system. Ramair guarantees that by replacing your restrictive OEM intake system with an aftermarket Ramair component you will see an increase in power and throttle response. The filters are designed to achieve high, almost unrestricted air flow while maintaining filtration levels critical to ensure the longevity of you