Re: Kit Intercooler
that looks like a 550/600x180mm core, the sort of stuff you get on ebay for 70quid.
Again, buy a piping kit from there too and get all the pipes welded up to make the longest continous straight you can. 2.25" should do.
You may need to chop and alter the turbo exit housing to point to the other side for the intercooler, easy to do, done often and reduces the bends.
On the pre facelift, a bmper cut would be required, later cars seem to have much more depth to the bumper, measure it and see...
BTW, going under the bar yo can fit a 880x190x90mm core (exc. endtanks) with some serious bumper mods.
Or fit a 600x400(500)x45mm cre if you move the rads a little - behind the bar.