Installation of the HKS 2 step colder Iridium spark plugs on a 2019 Kia Stinger GT2. 2 step colder plugs only recommended if you are tuned to push more power.
During this video, I did not gap them. HKS plugs come pre gapped to .028. However, i just recently swapped them out after 20k-25k miles because i was having some timing corrections and wanted to see if maybe it was the plugs, only this time i closed the gap on the new HKS plugs to .022 and that pretty much seemed to do the trick. Results will vary from car to car though.
Dielectric grease is an insulator. It is non conductive. It should not be placed on the metal parts. It’s placed on the ceramic portion of the plug to prevent arcing.
