[Sox]

I find this strange debate, a debate where there shouldn't even be one.

Multi layer steel head gaskets are simply better. Period.

If you want the job done properly, an MLS gasket is the only gasket which should be used.
Anything less on an AU is substandard, a patch up.

AU's have far far less head gasket failures than earlier Falcons for a very specific reason.

AU's have the MLS head gasket standard, and this is how they should be repaired.

Earlier Falcons can also have the MLS fitted, which improves them.

We build a variety of engines in our shop, anything even slightly worthy of decent power output and reliability will have an MLS gasket. No question. The very best engines we build use MLS gaskets where available.

Anything that uses an MLS gasket from factory, will also leave with an MLS gasket, no ifs or buts.

Using a graphite gasket on an AU is dumb.