Well ill be damn. I think i should look at my back yard first

Looks like ive been driving past NGK AUSTRALIA HQ every morning and night for the past 10 years.
Went past and this is what they said.
OEM BKR6EP-11
one colder
BKR7EVX-11 Platinum
BKR7EIX-11 Iridium
So Yes assassin10000 YOU ARE CORRECT

Never doubted you buddy
The one thing she did say ( yes it was a she. Is it only me but tech girls make me horn )
the OEM is 4mm in length whereas the colder units are 3.5. She said no problem.
The other way could be a problem / might touch piston.