These Ford Performance 3V Cold Spark Plugs fit 2005-2008 3V heads requiring the 16 mm thread.
For use in engines with higher than stock cylinder combustion pressures or sustained high rpm
Unique design is proprietary to Ford 3-valve engines
One heat range colder than the stock Mustang GT plug
Two heat ranges colder than the stock 5.4L-3V truck engine plug
Sold in engine sets of 8
Use M-12405-3V12MM spark plugs for 2008 and newer 3V heads
Note:
2008 engines with late style 12 mm spark plugs can be identified by coil engineering number 8L3E
2005-2008 engines with early style 16 mm "High Thread" design spark plugs can be identified by coil engineering number 3L3E part number
All 2009-2010 engines use 12 mm spark plugs
WARNING: This part is designed and intended for competition use only. It should not be installed on a vehicle that is driven on public roads and highways. Installation of this part on a vehicle driven on public roads and highways is likely to violate U.S. and Canadian laws and regulations relating to motor vehicle emissions.
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