Damn gang. Between 2 or maybe 3 different sets, I've put around 75,000 miles on my ACDelco Iridium spark plugs with absolutely no issues whatsoever. Probably wouldn't hurt to mention tho I'm also using MSD Performance 8.5mm wires, MSD Performance ignition coil, and an MSD Performance cap/rotor on an ACCEL Performance billet distributor. Haven't had a single misfire since doing all the upgrades! Oh, and a Standard Ignition brand ignition control module from O'Reilly as well! The distributor obviously came with a new cam shaft position sensor, and I've also replaced my crank shaft position sensor with a Standerd brand as well. It's a bit pricey but VERY worth EVERY dollar gang!
Damn gang. Between 2 or maybe 3 different sets, I've put around 75,000 miles on my ACDelco Iridium spark plugs with absolutely no issues whatsoever. Probably wouldn't hurt to mention tho I'm also using MSD Performance 8.5mm wires, MSD Performance ignition coil, and an MSD Performance cap/rotor on an ACCEL Performance billet distributor. Haven't had a single misfire since doing all the upgrades! Oh, and a Standard Ignition brand ignition control module from O'Reilly as well! The distributor obviously came with a new cam shaft position sensor, and I've also replaced my crank shaft position sensor with a Standerd brand as well. It's a bit pricey but VERY worth EVERY dollar gang!
And I was running the iridium plugs well before all the MSD upgrades, no misfire