370Z Plug freshen up. Autolite Iridiums any good?

[JArnoldsZ]

Autolite plugs any good for our 370Z's? 6.49 versus the 10.00+ Densos? Not to worried about performance but mostly the Thread match to our heads. This is usually the biggest issue. Anyone use these and have an evaluation?

** New to this forum. I am sure this has been discussed? Sorry but I don't see a Search? Maybe its just Monday and I can't think?

[amc49]

The biggest issue is heat range migration when you change the brand of plug, they never cross over to be exactly the same. I don't have a clue as to why threads would be an issue as the same tooling is available to all plug makers. But IF there was an issue then likely again because someone jumped brand there.

[chasracer2]

Yes they are good to go, no problems with thread pitch or temperature range.