i always think 3 inch is only needed on supra's...or monster hp making machines...not audi's. 2.75 is near overkill...

imo tho.

 

i have 3 inch, at one time i thought about 3.5 incase i choose a larger turbo

 

Just got my 3" from the cat back.....LOVING IT!!!! It sounds so f*cking nice. Full mandrel bent for only 200 dollars installed. I will try to take some pics and post them. For anyone else doing this, I say go for it. I still have the stock cat, but I am ordering a test pipe soon and when I get that on....I cant wait to hear it.