Hey.

Just curious; can you simply bolt a K04 turbo from a 225HP TT onto a A3 1.8T ? The K04 turbo OEM part number is 06A 145 704 P, and the BW part number is 5304 988 0022.

You'd need to change the exhaust downpipe, I believe the inlet section remains the same although some say that needs changing, also you need a new 5 bar FPR and a remap to suit.

Ok, so then I will go with the K03 sport from the 20th anniversay GTi. Thanks.