Mustang GT 12MM 3V Ford Racing Spark Plugs M-12405-3V12MM
The 2008 and newer Ford Mustang/F-150 3V heads require 12MM Spark Plugs.
Note:
- 2008 3V engines with late style 12 mm spark plugs can be identified by coil engineering number 8L3E.
- The 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+ Mustang GT engines use 12 mm spark plugs.
- Sold in engine sets of 8
Recommended Gap: .030 for Supercharged Applications.
- 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
