4 New DENSO Iridium IK16 Spark Plugs (Part #5303) - High Performance Spark Plugs for Cars, Trucks & SUVs - Improves Engine Performance & Fuel Efficiency

These plugs cost a little more, but are worth it in the long run.I have found them to have double the life of regular spark plugs. I believe my car starts easier and idles very smoothly with these plugs. I have also noticed they do not foul out like some I have used previously. I also run them in my Harley, where the benefits are just more than noticable. I am happy with the Iridium plugs and will continue to use them