I honestly don't know if they are better than the OEM, I probably just think they're better in my little twisted mind, But I put Irridium plugs in, they are the same spec used by Ferrari for the 360.

I really don't notice any difference, except that my mechanic said they will stand-up better to the higher octane fuel that I run in the car, which probably caused my OEM plugs to foul in the first place.