1.5T Mk8 Fiesta ST is the Scorpion Valved  GPF back exhaust system, this is the valved version of the two systems Scorpion produce for that extra bit of engine noise thats adjustable from inside the cabin to be quiet when needed.
Want to extract a little more power from your car? A GPF back system is the perfect compromise, leaving the factory catalysts (where fitted) in place and bolting directly to the OEM system. All Scorpion exhausts are designed for improved gasflow and sound, but leave the car fully road legal and MOT ready when the time comes.
70mm pipework removes any restrictions in the stock exhaust system and the twin 90mm Daytona tips fill the gap in the rear bumper perfectly.
Why a GPF back and not a catback system? The new ST has what's known as a Gasoline Particulate Filter as well as a catalyst, both of which are required under the new stricter emmisions rules. This system simply fits after the GPF to maintain the STs brilliant emmisions figures and mean it won't fail any MOTs.
 Please note valve requires OE motor from your vehicle 
Click HERE for a sound clip