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McLaren Weistec M838T Spark Plugs (One Step Colder)
SOUL PERFORMANCE
The factory plugs do not handle the M838TÕs high cylinder pressures very well and frequently result in misfire problems, especially on modified vehicles. Weistec spark plugs are 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.