well on John's website, he lists

NGK BKR6E-11

...

Well on www.clubplug.net it has
BKR6E $2.00 <-- maybe this one
BKR6EK $4.88
BKR6EKC $4.88
BKR6EKU $5.85
BKR6EKUB $5.85
BKR6ES $2.00
BKR6ES-11 $2.00 <-- More likely this one?
BKR6EY $2.00
BKR6EYA $2.00


Just wanna get the heat ranges and whatever else right (havent swapped plugs myself before). I was told to gap them to .35