Newbie with some performance ?s
You can do a few things first though, to see if you an quench your thirst for power:
1. ECU programming - not much horsepower, but the car will have nicer pickup in the midrange, more responsiveness and the gas pedal will feel more jerky :-)
2. Better air filters - K&N, stock air box is pretty nice enough already
3. Lighter main pulley
4. Switch out the exhaust manifolds to headers and upgrade the mufflers to get an overall more free flowing exhaust system.
This should bump you up from 382hp stock (somehow you've convinced yourself you have 400) to maybe in the 410-420ish range, but more importantly/noticeably - the car won't be sluggish and will react to throttle immediately.



E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
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