PowerFlow!!! I would rather eat my own genitals than give them any money. All my local one had to do was remove the box as I requested (and stood under the car with the bloke and showed exactly what I wanted). Did they manage that? Nope they did it their way and didn't add the brace I told them was needed and the result left me with a system that rotated on the flexi which subsequently failed costing me £120 to get rectified. Build an exhaust?