You have to take out the ECM (engine computer) and send it to the company to get it chipped. They chip it and send it right back to you. Plug that bad boy back in and your good to go, no modifications are needed. Although the higher boost levels (15psi) will tend to wear out the DV (diverter valve) a lot faster so upgrading the valve will help you hold boost a lot better.
If you wanna check out DV's or any parts for that matter go to www.ecstuning.com, this site can pretty much supply you with any parts you might need.

 

how necessary is the replacment of the turbos at 80k on a b5 s4? (it would really cost 10g's?). Wont the 1.8t need a new one also?

 

I love my audi A6 1.8T 2001 SE, its a really well built car. Dont know about their reputation in US, but they are known as reliable cars in Europe. Interior is solid, my car is 6 years old with 88k miles on the clock and not a single rattle. 1.8T engine is slow with factory settings. I imagine with 3L + engine it will fly.

A word of advise, do not follow the'long life' service schedule if you want your engine to last. 1.8T tends to accumulate sludge and block theoil pumpeven with highest quality oil. Do basic oil & oil filter change at least twice as often as recommended by Audi. I killed my turbo oncebecause of the above.

Enjoy your new Audi if you opt for it.

 

so on a scale of 1-10, 10 being as though it wont run without it. how necessary is the replacement of the turbos on the b5s4 at 80k miles?

 

The A4 has got to be the most solid-feeling car I have ever driven...though I own an A3 for practicality and financial reasons. As for turbo at 80K, as far as I know they're fine til the day they break, and when they break you'll certainly know it. Chances are you'll have to replace it once.