Not Ranked
I used what was supplied with mine except I welded the "adapters" to the sidepipes and welded tabs on both the sidepipes and the headers that are joined together with bolts going through these tabs. This is very similar to what a lot of race cars use. Once this was done and everything was Jet Hot coated, I used Permatex "Copper" to seal it up, this is the same stuff that you would use on you "exhaust manifold/Header" to "head" gasket if you wanted to. It has the highest heat resistance of all the sealants as far as I know.
John
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