The plug aspect of the shorty spark plug is where the magic happens—the part that fits into the engine, sealing the combustion chamber while facilitating the flow of electricityshorty spark plugs. These plugs are designed to withstand extreme temperatures and pressures, making them one of the hardiest components in any vehicle. They must also be able to create a reliable spark under less than ideal conditions, such as when there is accumulation of deposits or when the engine is running on alternative fuels.