Description

• Fits 2008 and newer 3V heads requiring the 12 mm thread
• For use in engines with higher than stock cylinder combustion pressures or sustained high rpm
• One heat range colder than the stock Mustang GT and 5.4L-3V truck engine spark plugs
• Sold in engine sets of 8
• Use M-12405-3V0 spark plugs for early style 2005-2008 3V heads
• NOTES:
  • 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