Ngk iridium plugs

Do ngk iridiums come pre-gapped?

 

According to their website they came gapped @ .044
I looked up the plugs for my Truck - 07’ 4.0

 

aren't the Iridium plugs for the 4 banger ?

Not the 4.0L ?

 

Yes for the 2.7

No for the 4.0

You’ll either have no problems, or have problems.

A very few have reported poor performance after switching to Iridium in the 4.0

Never seen anyone go with a standard plug in the 2.7. Not sure why you want to anyways?

 

Unless your super charged don’t waste your money. Get the coppers.

 

Yes, but gap them anyway I've always found my "pre-gapped" plugs to be off. Use the wire style gap gauge or feeler gauges not the cheep crap coin gapper.

 

@TnShooter what kind of problems have been reported with NGK Iridiums inthe 4.0? Got about 1k on mine and nothing odd so far... ??? (What should I keep and ear/eye open for?)
TIA.

Taco On!
Smokier

 

Over 70K on my 4.0's iridium plugs and still going strong.

 

I only use the Iridium plugs. The lazer Iridium can go to 100,000 before a change is necessary. If you use the regular Iridiums the change interval is 50,000 miles.

 

Yep. I always check, pre gapped or not. 90% of them are correct, 10% are not. I've had one of those wire gap gauges for more than 30 years. Serves me well.

 

From NGK web

they list em both for the 4.0

https://ngksparkplugs.com/en/part-finder

 

Hers is one example
https://www.tacomaworld.com/threads/trd-iridium-spark-plug.179923/#post-3795124

I’ve seen a few others.
The vast majority of the time, the Iridium plugs work just fine.
The 4.0 is fairly easy to change, not like it a “huge” deal if you do experience a problem.