Set of Eight Ford Racing 16mm Thread Cold Spark Plugs for 2005-2008 3V Mustangs.For use in engines with higher than stock cylinder combustion pressures or sustained high rpm. One heat range colder than the stock Mustang GT spark plugs. Fits 2005-2008 3V heads requiring the 16mm thread.
*If you have a 2008 Mustang, you need to determine if you have 2005-2008 "high thread" 16mm spark plugs or 2008-2010 12mm spark plugs. This can be determined by looking at the coil engineering number. If you have a 3L3E number, you have 16mm spark plugs, if you have an 8L3E coil engineering number, then use the 12mm version (M124053V12).
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