When i fitted mine i found a
problem, im not sure if it is the same but
the k04 has got an egt when fitted to the lcr or s3 and that sensor is about £150 second hand so i did a lot of research and found its a 1mm pitch bolt and i couldnt get one for love nor money. got a bolt from a honda civic vtec flywheel for about 80p job done! Hope that is your
problem. One way to see if it is that is fit it and fire it up, if it blows like mad then you know thats your
problem. the bolt is easily fitted once the turbo is on. if you still cant find any other info try the leon section?
cheers, Jack