Ford Fiesta ST150 - Manifold & De-CAT System Part No ? FD025-2, FD025-FLEXI & FD025-MAN Pipework Bore ? 57mm Please note fitting a cat replacement to any vehicle is strictly for off road use only and can bring up an engine management light on the dashboard High quality T304 stainless steel aftermarket performance exhausts with Mongoose?s lifetime guarantee. All Mongoose systems offer superb fit, exceptional build quality, performance increase, great looks and the ultimate in sound. Please note that those vehicles fitted with catalytic converters as standard should remove them for competition / display use only. The vehicle will not pass an M.O.T without a catalytic converter. Options: 4-2-1 or 4-1 Please specify in the 'Notes' section at the checkout.