This SAE Standard details a uniform method for classifying heat ratings of unshielded spark plugs.
Original price was: $152.19.$76.00Current price is: $76.00.
Spark Plug Heat Rating Classifications
SAE International , 03/01/1998
Original price was: $152.19.$76.00Current price is: $76.00.
Spark Plug Heat Rating Classifications
SAE International , 03/01/1998