Weistec Spark Plugs M177/M177-LS2/M176/M178

These spark plugs are designed and manufactured for not only high power applications but for factory replacement. These work for the M177, M176 and the M178 engine families. The factory plugs do not handle the high cylinder pressures very well and frequently result in misfire problems, even on unmodified vehicles. NGK spark plugs are also 1 step colder to help prevent pre-ignition in engines that are making more power than stock allowing you to further push the envelope of your vehicle. DESCRIPTION Product Overview A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine. A spark plug has a metal threaded shell, electrically isolated from a central electrode by a ceramic insulator. The central electrode, which may con