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Discussion Starter · #1 ·
I want to get some new NGK iridiums, are these the ones i need for my truck.
NGK (6619) LFR6AIX-11 Iridium IX Spark Plug? I know some of you will say that i dont need iridiums but thats what i want... ANd i just want to make sure i get the correct ones because the NGK website does not show which ones i need.
 

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I got them with a hefty gift certificate, but be prepared to shell out some $$ for 16 of those suckers. They do work well though.

The part number you have listed shows for a whole bunch of imports, all the way to some models of Yamaha outboard. Where did you get that p/n? According to sparkplugs.com, the only Iridium listed for 2009 hemi are Pulstar, Autolite, Champion and Denso (here is the search page). NGK doesn't list a compatible Iridium plug for the hemi after 2008MY. I don't know of the plugs are compatible between the 3rd gen and 4th gen heads. Doesn't look like it.
 

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Discussion Starter · #3 · (Edited)
Well i got it from Moesperformance the last set that i bought were from Moes i bought the 2 degrees colder ones and want to step back down to the 1 degree colder... Or just go back to the stock ones which are the original plugs i pulled out of the truck the first time LZFR5C-11's. here is moes page...

Ram OEM Stock LZFR5C-11's http://moesperformance.com/index.php?main_page=product_info&cPath=1_32_1263&products_id=12610

Iridium 1 degree #6619 http://moesperformance.com/index.php?main_page=product_info&cPath=1_32_1263&products_id=12517

Iridium 2 degree's #2309 http://moesperformance.com/index.php?main_page=product_info&cPath=1_32_1263&products_id=12518
 

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Discussion Starter · #5 ·
..well...you'll live an learn...I did...maybe it'll work better in the 4th Genners..
YEH YEH YEH I know Fred im goin back to my stock coppers.... They only have like 12k miles on them... Im cleaning them as i speak
 

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Discussion Starter · #8 · (Edited)
IDK i didnt realize until a few days ago when i was looking at them that the electrodes on them are really brittle and when i gapped them originally that i used a standard gap coin and it bent and broke a few of the electrodes off so now im jus going to put my original stock NGK's back in the motor...

But.. now i know that there is a different gap tool that pry's on the tips without bending the electrodes...
 

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Did you have a problem with the Iridiums?
my truck didn't like them at all, would get intermittent dings and a missfire code.. changed to ngk 4306's and have never had a problem since...
 
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