in the above photos notice the difference in the exhaust outlets and compressed air outpipe/'big silver pipe', between the standard turbo on left and td04 on right. i should of taken the photo with the exhast ports the same way but with mental rotation you can see that the 'big silver pipe' will be rotated 90 degrees further than the stocko turbo one. so to make it point (almost) straight up to into existing intercooler, instead of pointing into the engine you need to reclock it.
this involves undoing the comporessor side of turbo and spinning it and doing it back up.this process is done as follows.
note: the exhaust side of turbo can also be removed apparently by removing centre holding clamp and lots of love taps from a hammer.
Step 3a) unbolt gold wastegate bracket- you should be able to line up the bottom hole of bracket with the top hole on turbo. this is where it will bolt up once clocked. one bolt is enough for wastegate to function properly apparently.
3b) put turbo in vice compressor/silver side down. you will see a giant metal circlip lurking in there which needs to come out. its a bitch so just persist with it. a small flathead helps here.
note: some turbos have this circlip and stuff to clock it to any angle and others have a few bolts evenly spaced for set rotations.
there is also a locating pin inside which couldnt see before which i snapped it off in the process of getting the clip out. REMOVE this locating pin by tapping each side of it with a hammer and screwdriver. else the compressor housing wont go back on properly.
3c) the whole compressor housing is now removeable, like pic below, (it shouldnt need any love taps from the hammer) but you just need to spin it 90 degrees so the wastegate hole lines up as said above. bolt it up loosely and tighten later.
3c) get the biatch clip back on. this helped me check that the turbine shaft still spins freely. else you have a problem.
3d)bolt turbo bits back up.
turbo will now look like this with all exhaust ports and 'big silver pipe' lined up to match the old turbo.
Step 4) time to cut flanges off wrx up and down pipes. now as the td04 is slightly larger than the stocko it hits a little on the engine. so what ya have to do is space it up about about 2 inches so that nothing fouls the engine. so this means leave a bit of pipe length on your flange cuts so that these are extended when you weld it on.
like this pic of the up pipe below *not mine*
note: for the up pipe flange, the stock ea82t one will fit with a minor adjustment made to the furthest stud. it needs to be moved about 1 cm outwards as in pic below *again not mine*- this dude has also added a stud but im pretty sure its not needed.
Step 5) this is where im up to atm. i plan to use lots of the wrx up pipe so that mine is fatter then the stocko skinny pipe and like the above picture.
next week i am towing car to the workshop and getting them to weld the pipes up. hopefully shouldnt cost too much. or take too long.
i am going to change my intercooler to another bigger unit and whack a new bov on because not having one before contributed to my turbo dying. and also i get cool psssht sounds. but no more fluttersluut
i will also try to squeeze in a tune before shops close for chrissy because i am running an aftermarket ecu im guessing it will run like a pig.
still pulls hard tho. not a huge difference to the stocko but noticeable. 
