There are several different rear drive shafts and there doesn't seem to be a hard and fast rule about what fits what.
You can have:
a pair the same length with the diff locating snap ring on the shaft
a pair with one long and one short with the snap ring on the shaft
a pair the same length with the snap ring inside the diff and just a groove in the shaft.
The differences are due to either having; an open rear diff, a viscous 'limited slip ' rear diff or a plated limited diff - last one is unlikely on a UK car, but is a feature of some JDM cars, which means that whilst the car that the shafts have come from looks like yours it may have a completely different set up
2 door type R ones are thicker and require a different diff and hubs plus the snap ring deal. Type R don't have ABs of any sort.
If you get the management light come on, sure you know why, but it might persuade the ecu to go into 'safe mode ' and restrict you to 4000 rpm
Good luck with all this, it is not transparent as we in the trade are aware.
David APi
Last edited by APIDavid; 12 September 2012 at 10:07 AM.