Finally got this done the other day! Couple of things I thought I'd mention if you are thinking of getting the same kit.
1. You will need to remove the radiator or at least one of the cooling fans in order to get the manifold into place.
2. If mating it up to the stock exhaust, you'll also need to have a short length manufactured to join the two together (looking at the XS Power and OBX systems, you would have the same issue with them all). I did suggest to the guys that fitted mine that they make a pattern just in case anyone else wanted the same thing as the angle of the flanges is a little awkward. I don't know if they did or not, but you could always give them a call and see if you're stuck! (AA Silencers, Cheadle, Staffs. 01538 753252)
3. You will need to shave a little off the flange where the headers pass under the engine for it to clear.
4. Ideally, you will want to extend the Lamda sensor wires too and fit it to the hole in the flexi pipe piece as it will otherwise only read from the one cylinder.
Here's the bottom half and a close up of the bit that you need to mate the Motoria system to the stock exhaust.
Having driven it for a couple of days now, the low end is far more responsive then it used to be.
Big thanks to Sharky for the great deal he did me on these in the first place