Take all connections off old OEM tip like n75 & DV etc. Then disconnect the rubber hose from the metal pipe. Pull metal clip away at front and side at same time. Two people makes the job much easier. Then onto taking the metal pipe off.
When doing mine I found it easier to take the air box out. You can the see the turbo better and get in to reach it better. The original pipe is held in place by 1 Allen key bolt on top side. Undo this then wiggle old pipe away from turbo towards wheel arch. You can also get your arm down back of engine and just reach the turbo from behind too. Might need to ease the pipe away from turbo with a screwdriver to
help prise it away. Once old pipe is off turbo you have to manoeuvre the pipe between engine block and a solid pipe (coolant maybe?) to get it out.
Once you do this you can start fitting your silicone tip. I rubbed a small amount of engine oil around the inside edge of tip where it attaches to the turbo. It is tight to get it on but if you put it down the gap between block and pipe so the turbo end points towards back of car then once pushed and squeezed through you can twist it over the flange on turbo. Feel all the way round to make sure it's on properly. I then undid a hose clip and looped it round before tightening it til it just grips. Make sure all connections are in right place and if happy fully tighten because it's hard to get to once other hoses are connected to it. Connect other hoses then refit airbox and connect to that. Start car rev a little just to check no leaks then take for a run. If you've no leaks or anything you will notice the difference.
Turbo spools 200-300 rpm sooner and keeps going until higher in the revs.
always better to have a good air flow as you know but jusy wanna know if its a good tip 
