I think that its a bolt on fit and the only thing you might have to change is the pipe work that connects to the top of it / extend wires (for the iat sensor?)
i've heard of a few people who have done this for the sake of adding a fmic, as it means that you can keep the stock pipework from the turbo straight to the front of the car + a few additional pipes to connect the other side of fmic to the inlet.
Also, remember to keep the upgraded injectors / 3" maf out of the car until it comes to remapping.
hope this helps.