Spark plugs do not explode they detonate often from poor fuel quality, lack of fuel delivery, or extreme heat like say if your intercooler pump failed. There are more exact reasons but based on the fact the supercharger was on the truck for 30K miles with out issue makes me think it was bad fuel or a failed intercooler pump leading to extreme Intake Air Temperatures. Being it's winter time makes me lean toward bad fuel. Fuel quality deteriorates in the winter due to changes in the blends like additional ethanol and additives. This makes the truck run lean or more aggressive and more chance of detonation.
Detonation on the spark plugs could have sent material into the engine ultimately leading to piston failure, ring failure, damaged valves, etc.. This would make the truck run rough, a damaged cylinder is very similar to a fouled spark plug. So I ask, after the dealer installed a new plug and coil did it run better or still a little rough? If it was still rough the damage was already done and you drove it until it failed completely.
Also what plugs did they install? The factory plugs are a hotter heat range than the recommended NGK 6510's and require a tighter than stock gap setting.
We've supercharged hundreds of Raptors and I must say I've never heard a story quite like this. However I could see it being the case if poor fuel quality was at hand or a failed intercooler pump. But being it's the Winter time and that is less likely I'm betting the farm you got a bad tank of gas.
JimIII
