Silicone Joins for Stock I/C pipes

[stu0x]

Quick question: I\'ve got an RE:A hard pipe kit for the stock intercooler. The pipes have a habit of blowing off, which I think is down to the silicone joins having decayed. Does anyone know the dimensions needed for the silicone joins? As far as I can tell the intercooler ends need to be reducers (ie the intercooler socket is narrower than the hard pipe end), and the plenum/elbow ends need to be straight?