Spark Plug - which is which?

[Kazuya Mishima]

I've been away from my s14a so long, that I don't remember which spark plugs to buy

Did some searching on the forum and found that most commonly used (NGK) spark plugs to be:

PFR*B
BKR*E
BCPR*

What's the difference in each type/code?

[Real Mark D]

bkr7eix platinum 40 quid for 4 ish
bcpr6es copper couple of quid ish
pfr6b standards i think?

heat grade dependant on mods, safe with 7 heat range i believe

[Kazuya Mishima]

Coolies.

Are the standard plugs iridium?

Also, do the plugs need to be gapped, or are they ok out of the box?

[Chriscooke]

Get bkr7eix from sparkplugs.co.uk for about £20. They come pre gapped so fit and forget