Originally Posted by _Adrian_
I'm in the same boat as you guys...
I just picked up a 00 A6 4.2 Tip and want a bit more out of it.
Got a few small maintenance issues to take car of first then i will add a cold air intake and exhaust without sacrificing comfort.
I would like to add Unitronic
to the "list"
Here is my 2 cents.. First before modding , make sure the car is in great shape.
Oil correct type and correct levels ( change oil at regular specified intervals)
Battery and electrical ( Alt and other charging components ) are working within specs. make sure all battery connection are clean and tight. A healthy ignition is a must , especially if you will be modding
Make sure Fuel pump is like new ( they gradually lose efficiency over time)and so do the O2 sensors..
Tires incorrect pressure will add resistance, brakes can drag also robbing you of power.
On my cars I used to have some much crap in the car it was ridiculous.. Remove all the crap , weight and heat are your enemies.