MILLTEK SSXFD239 Large-bore Downpipe and De-cat FORD Fiesta Mk8 1.0T EcoBoost ST-Line 3&5 DoorDescription MILLTEK SSXFD239 Large bore Downpipe and De cat FORD Fiesta Mk8 1. 0T EcoBoost ST Line 3&5 Door Milltek Sport Large Bore Downpipes are designed to improve both performance and sound. These downpipes feature a larger diameter compared to standard OEM parts, allowing more exhaust gas to exit the engine and pass through, which increases efficiency. When used with the Catalyst Bypass Pipe, significant power gains can be achieved without