I'm sure the MK5 won't fit. the MK6 won't fit without AT LEAST some serious customization, for a fact the R has an additional oil cooler on the left air vent that's pretty close to where the piping go.
Also these twintercoolers are made to fit on the OEM MK5 and MK6 GTI intercoolers, the R has a different OEM intercooler so probably it won't be a bolt-on.