Fitting my Miltek on my S3 tomorrow. Im aware of the awkward down pipe and having to drop the front end of the prop, that's not a problem at all. Just curious what you do about the valve in the tailpipes? I've not looked at how its plumbed in, I presume its vacuum operated from a solenoid somewhere else in the car? Do you just remove the vacuum piping and tie it up out the way? Will this not cause a fault light etc? any help is appreciated, thanks.