Like Rory, I use the Felpro gaskets with good results. Also liked the Hooker supplied gaskets but never looked to see if they were available separately. I suppose the High Temp Silicone has it applications but hate the red mess before, during and after removal. An open header application will take less to seal than a muffler combination with considerable back pressure. Street cars need longevity where a race car can get by on a marginal gasket. I'm still going with the Felpro.