You just had new plugs installed, was this because of the misfire, and dying at temp? What misfire codes do you have? It would be worth pulling the plugs and coils on those cylinders and doing a visual inspection. It also wouldn't surprise me if someone damaged a coil twisting and pulling it to remove it.
Installed A new turbo charger and new blow off valve Air cleaner new plugs new oil the oil filter Did all that when the turbo charger blew out have a stage 2 tune Nvidia exhaust Cobb intake Ran fine for a couple days then just started shutting off and miss firing