I just spent all day removing the turbo from my a4 1.9 tdi which in it self was a mission and using this forum and other peoples knowledge found out the 2 lt 170 brake turbo bolts strieght on so changed it all in all 6 hours lol now i have realised the turbo hose dont fit as the 170 turbo inlet is massive compared to the meesly 100 turbo that was on it so now a trip to burtons ilford in the morning to get a samco turbo hose that fits lol should be a great inprovement as i have already got decat and 2 half in strieght through exhaust system and a k&n 57i induction which is a vast improvement as standard but once remapped should be good for 200 brake.