Does anyone know what that equates too in a NGK plug as far as heat range??

 

I believe it equates to any any NGK "7" heat range, ie, BKR7E-11

 

anyone else?? I thought it was a 7 heat range, just wanted to clarify???

 

Yep, that equates 7 heat range on the NGK. I'm using IK22's on my WRX and BKR7e's on my Civic but I'm gonna switch to BKR7e's on my WRX too.

 

Yeah I just switched back to IK22's on my Subaru and it runs a ton better than the BKR9EIX I had in there. Those plugs were awesome when it was warm out but now that its cold the car sounds like it shooting ducks until I get some heat in it