What Will Happen With Wrong Spark Plug ?

[Robenstein]

Some plugs are better than others IMHO. For me I like plugs that have nickel or chromed threads which are more corrosion resistant than just blued/black oxide plugs like some AC delcos or Autolites. I tend to use NGK or Denso whenever possible, but I have used the Bosch copper plugs with good luck on my small block chevy.

 

[HTSS_TR]

Originally Posted By: kr_bitog
One range hotter typically is still tolerable, except the car already have overheating problem at the beginning. The pfr, ifr and bkr is interchangeable so no issue as long the gap is correct. BTW, why don't you use the Champion 9201 you are selling ?

The recommended Champion plug is 9800(RC6WYPB4), Champion 9201(RC12WYPB4) is too cold for the S2000.