I have a saloon A4 S-Line Quattro which has had the stage 3 A.M.D treatment. It wasn't all done at once and i had the benefit of feeling the change as each stage was carried out. I feel the car as standard just isn't quick enough and the transformation was incredible. I then had the full milltek exhaust fitted (cat back) which took it to another level, as it did with my previous car. What surprised me the most was the addition of the Sportec intake pipe. i couldn't believe how such a 'trivial' mod was so noticable. Initial pull improved but at the top end of the rev range and at high speed the pull is incredible. The car is running around 260bhp and slightly more on torque. It is great to drive and I would recommend to any S-Line owners to have this done. I have used quite a few performance enhaning centres but none come close to A.M.D. A great bunch of guys who knows the vehicles inside out. If you have to borrow the money, stay in on a friday or sell the misses it is money well spent.