i had my car mapped a few weeks ago and also had a panel filter and a forge dump valve fitted at the same time! i noticed after doing it the car sounded different i was expecting that! but late at night and early mornings the turbo was lots louder than before! and now with the cold weather its like it all the time! it sounds like a screaming kid lol! but its pulling great! anyone else noticed there cars screaming or is my turbo buggered??