What I would do? Find another good used A12 manifold combo (intake/exhaust assembly) and put that on. No messing with the middle gasket.

hi the gasket i make my self because i cant buy the 3 bolt type anywhere i make it from the gasket that has steel in the middle and fibre stuff on the out side i dont no why it keeps blowing out but il try making a new one and using the exhaust concrete stuff on both sides of the gasket then putting together!

should i or not?

Thanks!

You should ask yourself why it keeps blowing the gasket. Ours are 40 years old and have never had gasket problems. Are you using the stock fiber-asbestos gasket?

Yes the A14 manifolds will fit your engine, but are not round-port. See Exhaust Manifold.

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!