I have a 2005 B7 Audi A4 2.0T Quattro which has been remapped by Revo. I've had the car for about a year now, and never really felt the delivery of power was very smooth. When you put your foot down from say 50-mph up to 70mph it will hesitate slightly when the turbo is delivering maximum torque. However, it's very subtle and I just put this down to the quattro system. Last week though - this problem got worse. If I drive gently or accelerate very very smoothly the delivery of power is fine, however the minute I accelerate a little harder the car judders and hesitates? Doesn't really feel or sound like the clutch.. 55k miles on the clock, two owners and generally I very well cared for car. All four tyres match and have similar tread depths. My wife did however knock the tracking out back in Jan and the front tyres have scrubbed edges. DOH! Thanks in advance for any input!