I take it your on about the pace double capacity type intercoolers and your using the standard fan? If thats the case then you would need to make up a couple of brackets for the bottom of the fan out of that metal macarno stuff (cant remember what its called) or phone pace and they can supply the fitting kits but they were about £50 the last time i heard.

Just so you know them double capacity ones aint alot if any better than the standard inercooler.