ALL SPARK PLUGS ARE SOLD INDIVUALLY!! Up for sale is NGK 2002-2003 Chief Indian SPARK PLUG #6597/04. The vendor part number is 6597. Please read the title to know what is for sale SNOW CAT ONLY ILKR8Q7 Spark plug can be used in place of ILKR8Q BPR8ES Spark plug can be used in place of BPR8ES-S
I run these in my Pro Street Harley Shovelhead with a full race cam and they last longer than other brands before fouling (runs rich at idle). They also came as original equipment in my Supercharged Crossfire SRT-6. I recently replaced those 12 at 100K miles , and they didn't really look that bad even after 11 years and that many miles on that vehicle.