The splitter is the metal T piece that bolts on the diff 10mm or 12mm bolt a rubber line goes to it and the metal lines come out of it that go to your wheel cylinders There will be one on the H145 diff. You need to put it on to the drivers side of the H165 diff. So if you have a tail shaft that fits e.g ute one then it should fit if you need it shortened it will cost bugger all i paid $60 for an engineer to do mine and he even balanced it.