Exhaust Manifold gaskets, Opinions

I do not know which one seals better but i now people who re-use the SLP gasket.

I am running an SLP gasket currently.

Both do the same job..

But the metal one can be abused more.. Can handle more pressure..

All in all you pay for what you get..

My vote goes to the SLP Metal type..

I wish mandatory SS gaskets were made into a law lol.

I give them a swipe with 1211 bond (3Bond product). Little goes a long way and cleans up easy on disassembly (stays soft), cures aerobically and anaerobically, low viscosity, but sometimes bonds too well lol. I've used it without gaskets or o-rings for cylinder heads, exhaust manifolds, and is the only stuff (that I have found) to use on your grafoil seals if you want it to still be there upon disassembly.
Bin around for decades too. I seem to appreciate that more and more lol.

IMO the first time you remove and clean up the original ex. gasket should be enough to tell you it will be the last time lol, no matter what the cost.
I think Poo still uses this material here to save on one surfacing operation on the Y pipe. I like things flat so I surfaced the welded plate. Belt sander and straight edge to keep you true is pretty good.
I think my motor really likes me when I do this kind of stuff lol.