hi, I would like to do a Stage 1 on my Cupra 280, but before doing it I am undecided whether to put a Downpipe without Cat, in your opinion is it worth it? In terms of sound, does it make too much noise? I already have a modified exhaust that makes enough noise, I wouldn't want it to be too annoying at low rpm, but in terms of power will I get a perceptible gain?