Koyo aluminum race radiators?

[kylefoto]

I jumped in on the group buy for these a couple months ago and finally got around to installing it to find out that there's a big hole in the bottom threaded for something.
And no, nothing came with it to put in there to plug it.
Anyone else have this same problem? what did you put in there to block it?

 

[swaq]

Yeah, it's there for a temp sensor, I think. If you aren't going to use it then you can plug it with a m16-1.5 drain plug. I just went to Knecht's (or was it Schuck's?) and asked for one.

 

[MKIIINA]

/\ correct, its a bung for the temp sensor for the 1jz. im using the exact same rad