can i use a radiator from a fc for my fb?

 

yes you can. All it requires is some time cutting away metal. I have a stock S4 rad in my car. Uses a S4 upper rad hose and the lower hose is the stock 12a upper hose cut to fit. All in all took me about 5 hours, i found it better to cut twice or three times to get a good fit then to cut too much out the first time. Here are some pic's





















Hope this helps you out a bit.