Originally Posted By fourgearsavoy
I am currently running Denso iridium plugs for a Toyota Tundra in my 10.9 compression 493 with Indy EZ heads and they run perfect all year long.
I have considered using the twin ground plugs but it runs so well with the iridium plugs why change shruggy

Gus beer


What type of plug did you run prior to the iridiums? Did you notice anything on the change?