If you fit the RS500 hoses, the extra girth (oh er ) catches on the blades of the alternator and so this has to be dropped down on an RS500 bracket (£50 delivered). However, you have to grind a piece off the side of the block to allow the bracket to fit (if you look underneath where the alternator currently bolts to, you will see).

Alternatively, you could chop the ends of the 500 cooler off (remembering to keep hold of them in case of future requirements) and the ones off your 4x4 one to weld these to the 500 item (or better still, buy a £30 2wd item to do this to, as a 4x4 one is worth £80-100). This negates having to spend £150 for the RS500 boost hose kit and the £50 for the drop bracket (as well as having to chop 1" lengths off you old hoses to sleave down the insides of the 500 hoses to fit on the turbo and throttle body). If you did ever get a T4, you could reverse the process.

The choice they say, is yours... .