This adapter is for the MKII /MKIII style sensor
Toywagen.com us no longer making them
It is used on the later coolant necks 1.9
You can install the stock MKI type 1/8 npt sensor or a aftermarket type coolant sensor on this adapter.
I sent a email to Nick at Streetoys if he would be intersted in mfg this item.
Anybody else looking ?
picture? I don't know if I will need this? I have an aaz head but 1.6 cy block
You only need this particular adapter if you're wanting to run the old-skool brass temperature sensors:

on the later coolant manifolds that are expecting the bigger cartridge-style temp sensors:

The adapter looks like this:

The owner of toywagens.com told me at the time that I bought his last one... sorry guys!!
I don't even have a coolant neck yet.

Don't think that I will need this, though.
Since no ones makes them now, Iam going to install both of the 1.6 type assys
Front housing will be for my aftermarket gauge (1/8 NPT ), side outlet will wire to the stock cluster gauge.
Gee-Bee
Is there an OE part # for that adapter?
TOYWAGEN ,said he might do a min production run of ten unit's
G.B.
Is there an OE part # for that adapter?
Nope... which is why the Toywagens of the worlds started to build 'em on the side.