no worries....
first i'd like to say that a transmission swap is pretty much out of the question. I’d be way cheaper to sell the auto one and buy a manual one. If he needs to keep the auto one that’s not really that big of a deal. There are two computer systems in the tiptronic (auto) A4… one for the engine and one for the transmission. Just as there are engine chips there are also tiptronic chips which increase shift points, etc. for more power.
Second thing: of the two engine models in the A4, your friend has the least modable. The 3.0 is a great engine, but because the 1.8 is to tuneable very few companies make mods for it. You’ll be able to chip it….. exhaust … and that’s about it. The factory airbox is better than any aftermarket on.
So… if at all possible… sell the 3.0 tip and get a 1.8t manual. if not, we can work with what you got.