does any one now wat car / motor this exhaust manifold comes on?

pepper.. 1600 is close

copper gasket goo (loctite usually) is bettter than any gasket anyway though

most people call it the "gx" manifold, basically it came on "gx" models of 1200 with the "gx" 1.2ltr motor installed (twin SU style carbs)

there is bugger all if any "gx"'s just tootling around, the manifolds are generally sold and bought seperate to cars from peoples parts collections these days

australia has pretty much completly been raided of these manifolds by portugese and other over-seas racers who are forced to use these original bits in historic classes, hence they are a lot harder to find than even five years ago, and no body wants to sell them,

im not sure if you are pk75's son possibly? but he has been trying to get his hands on a set for the same reason as you

yeah rallycar, a L16 series one is what i used, the bolt holes need to be modded slightly and the exhaust holes are a bit big. doable but.
wanted something a bit closer though.

go the goo!!!

been using it turbo housings with out leakages

if your getting leakages you probably have other problems like the entire exhaust hanging from your join

make a bracket to support the exhaust after the join, connect it to the gearbox bell housing bolts, also a flexi-join is very good if you get one of them put in your exhaust just after the collection point where the two pipes meet

ive olny had it blow out once, and the new one has held up to the task thus far.
all's i want to know is there one i dont have to dick around with to fit it.

no

the reason they dont have a gasket is because i belive they didnt come with one ill post up a pic of what i mean later on today

They sure do come with a gasket from factory.

Pepper, I bought a few gaskets from Toshio-san from B-projects mid last year ~$10 each.