TexasBlownV8
Formerly TexasBlownV6
Using the 2008 and later heads with the 12mm spark plugs, will the earlier COPs (from 2007 and earlier) work with the newer heads and plugs?
Older heads are 3L3E, with newer heads 8L3E?
All references to plugs say to refer to the engineering number on your coils; if you don't have the coil packs, you can't do look what ec # is on them. But the heads are the newer designed heads, so they'll need the 12mm plugs.
Older heads are 3L3E, with newer heads 8L3E?
All references to plugs say to refer to the engineering number on your coils; if you don't have the coil packs, you can't do look what ec # is on them. But the heads are the newer designed heads, so they'll need the 12mm plugs.

to do.