Ford Focus Mk3 ST Diesel Dummy DPF Delete Kit100% Stainless finish. lifetime warranty to original purchaser Maximise the potential of your Focus ST diesel with this DPF delete pipe, this will not only make your diesel sound the part but by removing the restrictive DPF we can unleash the last ounces of hidden potential from the Diesel Focus ST. This item in many countries is strictly for track use. this item on a stock car will eventually throw check engine light and must be mapped out to stop