hi in my a12 engie the manifold has that hot box system which is such a pain as it keeps on blowing the gasket in it and starts leaking it been resurfaced but still blowes gaskets and sounds like a tractor!

So from my understanding the a15 came with the manifold with no hot box? will this bolt to the a12 head?

also is the flange the same to the exhaust?

last anyone have one wanting to sell it to me??

Thanks!