I believe they're NGK and I belive they use an iridium electrode, might be platinum.. I believe they are 100k mi plugs but I'll change mine out at around 65k
I won't be able to check until thurs so hopefully someone will beable to get u a definitive awnser before that
Also some of the plugs came inproperly gapped so if you intrested you can check them in about 10mins. (Mine we're close but alil big). I belive the gap should be .028, eric or rdss can confirm. Keep in mind if anyone does gap their plugs not to pry agianst the skinny electrode tip as it will bend or break
There is a big debate about what the gap "should" be, but I'm sticking with .028. GM specifies much bigger for the 1.4, .033-.037 IIRC, but people pushing power through the engine have had issues with blowout.