High Flow 3/76mm Down Pipe & High Flow. High quality stainless steel 3/76mm down pipe and high flow 200 cell sports cat. A must for anyone trying to increase the performance on there golf R mk6/ mk5 gti /edition30/2.0tfsi.Most chipping companies offer a stage 2 ECU upgrade with this mod so you are guaranteed to get the maximum amount of power from the standard turbo. They also can give upto a 10% increase in power on a standard car as well as reducing turbo lag and still keeping the emmissions legal. It has been designed and developed to replace the standard down pipe and cats and has been fabricated to the highest standards from a high quality stainless steel.