i need the size of the inlet side of the USDM intercooler pipe. my jdm one is about 45mm or 1.765in and i don't think the clamp i got with the Corksport charge pipe will close it enough, plus i ask corksport( looking for a BOV that would work with there charge pipe) and they would like to know.

 

There is no difference between JDM and USDM intercooler inlets. There is however a difference between S4 & S5 intercoolers. The S5 has a slightly larger diameter inlet.