NGK Iridium IX Spark Plugs 11-21 GT
These NGK Iridium IX spark plugs feature an ultra-fine center electrode that's deigned just thick enough to ensure the maximum durability and life of the spark plugs, and just tin enough to create an accurate and consistent spark. They represent the ultimate evolution of spark plug technology and performance. Iridium is significantly stronger than any metal used in spark plugstoday. It's the hardest metal used which has allowed NGK engineersto reduce the voltage requiremnent for a spark.
These 1 degree colder plugs are recommended for supercharger, nitrous, or turbo upgrades.
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Purchased this item along with the VMP supercharger kit! I highly recommend it over any other S/C! Hypermotive have the best customer service and they helped me a lot with this purchase processes! Thanks Dan for paying attention to my request as i was the only customer (which i am obviously not!). Will do business with HM in the future for sure!