Hi all, posted recently regarding a possible boost leak with my mapped S3. Had the front bumper off and tightened the clamps up and still the same. Out of desperation took off the turbo to i/c pipe and various brackets , made sure the pure oxygen sensor was tight, and refitted everything making doubly sure all was secure and sitting right. Next thing was the DV . Got the forge one , and when I originally had it , it felt weaker than the standard one. Forge gave me a yellow spring when I called them about it. I tried the original one back on tonight and the difference was quite noticeable. Much sronger pulling . Haven't had Vagcom on yet. This leads me to ask....... Should I have a blue or red spring instead of the yellow ? Boost is around 1.5bar. What spring does everybody use ? Chris.