My import wrx is running these plugs doesn't seem usual from what I've searched

 

Can anyone advise me on this?

 

Assuming you have a Classic(?), then the most popular is the NGK PFR6B (which I think is the OEM recommendation).

Or if running mods/upped boost, go for one grade colder, the ...7B.

I have 7Bs in my 384/349 STi 5 - working fine. No issues with misfires etc. (I also had them in my old 1993 WRX, mapped to 282/273).

OEM plug gap is 0.8mm. But most people go for 0.6-0.7mm, to prevent the boost blowing the spark out. Ergo, a common gap is 0.65mm (mine are gapped to this).

 

Those plugs you mentioned are a lot cheaper than the 50 quid required to replace the denso plugs. They not iridium? I don't want to put in something less than what it had before

 

- Yeah they're around £30 for 4.


Dunno. They're good enough for me - det not a problem; timing not a problem; misfires not a problem.

And I assume they also stay together okay(?)

 

 

Ha ha! I didn't even think about 'that'. ...For once!

LOOOL!

 

i wont let it die!

 

WE... won't let it die.