Focus RS Mk1 k&n Gen2 Cone filter upgrade Forge in this case you are

in this case you are saving up to 30% and gaining a 6% increase in added air flow

Increased Bhp reliability

A grilles from Zunsport fitted to your Ford Focus ST will bring not only an enhanced appearance but also protection from ingress of road detritus and leaves which can cause damage to heat exchangers and corrosion to brake areas

This causes the probe to read a less accurate signal which will then not trigger the ECU into recognising the catalyst is being less efficient than the ECU would allow

Focus RS Mk1 k&n Gen2 Cone filter upgrade Forge in this case you areWashable and reusable. Comes with full fitting kit & step by step Instructions, a real must for your Focus RS. The Worlds Best Air Filter Million Mile Warranty Improved Induction sound As fitted to our own Focus RS Mk1 Demo Car Designed to increase BHP and acceleration