what plugs

A

another sunny

Guest
I am about to fit some new plugs and i dont know what ones are correct. I am going to fit NGK iridium`s, i have been told that ...as my car is modified to about 290bhp i will need one grade cooler as a plug, that meens (i have been told) BKR8EIX instead of BKR7EIX. Is this right?
 
A

AJ4

Guest
I'm not sure the numbers are correct, but they do need to be one grade colder than standard.
 
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