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  #21  
Old 06-01-2012, 03:02 AM
theweavman theweavman is offline
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Lunchbox1, thanks for your offer, but if you check some of the newer posts above, the Police Vehicle plugs have been identified... They are NGK Iridium plugs, installed them in my 09 Ram... They work great
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  #22  
Old 06-01-2012, 03:57 AM
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Thanks for the update weavman. If you like them in your ride I may replace mine also to those....I have been lazy and have not replaced my plugs yet cause I have been trying to find out the best ones to use.

Thanks again
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  #23  
Old 06-01-2012, 10:54 AM
theweavman theweavman is offline
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Lunchbox1,
So far very happy with the new plugs, smoother idle, good acceleration, and as a bonus my milage improved by about 2 Mpg.... But I also think that any of the new Iridium plugs from Bosch, Autolite etc would work just as well.... But by using the MOPAR ones, my dealer can't complain if any warranty issue should arise... And you don't have to change them every 30k, while the job can be done, wouldn't want to have to do it often... Take care
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  #24  
Old 06-02-2012, 12:07 AM
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Thanks for all the info weavman
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  #25  
Old 06-02-2012, 01:34 AM
theweavman theweavman is offline
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Lunchbox1, Happy to help anyway I can
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  #26  
Old 06-04-2012, 02:01 PM
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Theweavman,
The closest nkg part# I could find is IFR5E-11. This is described as a laser iridium spark plug. Are there any markings on your plugs that might validate this?
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  #27  
Old 06-04-2012, 02:26 PM
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Phreeride:
The part numbers are as follows for the Mopar Police Package 100k plugs...
Mopar # SP-143877AA
NGK # 1LZFR5E-11,
I think the number your looking is probably correct, looks like they just dropped the first 3 letters for some reason... The NGK plugs are marked NGK IR, for iridium....
Might check out moparpartsoverstock.com, using the Mopar number... They can get you the right plugs.....hope this helps
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  #28  
Old 06-04-2012, 03:23 PM
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They don't recommend using the Platinum plugs close to the coil paks, because they burn very hot & have been known to melt the coil paks
It is ok to use them in the upper 8, away from the coils

One of our site Sponsors, Mopar Online Parts has the recommended NGK plugs for less than $4 each, plus shipping
they wrote:
SPARKPLUG [Part# SPLZFR5C11]
List Price:$4.60
Your Price:$3.16

Shipping would be about 13.XX

NGK website info
http://www.ngksparkplugs.com/part_fi...uv/results.asp

------------------------------------------------------------------------
from your Owners Manual, Maintaning your vehicle, page 511, mentions the Champion Spark Plugs
http://www.scribd.com/doc/84757290/3...outer_page_456

Champion also makes the spark plugs for our Ram 5.7L
Champion part # REC14MCC4

By the way, i changed my plugs at about 42,000 miles, i still have them
all have good color, the electrodes, insulators, etc. all look good
http://www.ngksparkplugs.com/tech_su...qs/faqread.asp
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Last edited by GTyankee; 06-04-2012 at 03:57 PM.
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  #29  
Old 06-04-2012, 03:40 PM
theweavman theweavman is offline
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GTYankee,
First the Mopar Police Plugs are made with Iridium, not platinum...second: in the newer 5.7 Hemi engines there are no upper and lower plugs... All plugs are paired side by side on each cylinder.... Third: the plugs are deeply recessed and are a few inches away from the coil bodies
Fourth: the plugs being discussed are directly avalible from Dodge, and we're designed for use in these engines...
Fifth: they cost about 16.50 each, but only require replacement every 100k miles rather than the 30k interval that Dodge recommends for the less expensive standard plugs....
It's all about choices my friend, I choose these new plugs and was posting the info for anyone who might be interested in changing over to a better and newer technology plug, thanks for your input
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  #30  
Old 06-04-2012, 03:41 PM
phreeride phreeride is offline
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Theweavman,
Actually I think they dropped the second two letters (LZ) which probably stands for laser. I'm almost certain this is the same plug. I don't want to wait 3 weeks to get the mopar plugs. My local advance auto parts carries the nkg version so I think I'll try them. The only concern I have is the correct heat range. As long as the plugs are the same length as stock I should be ok. Folks have been chiming in not to run these plugs but because you're having no issues I'll try them. If I have problems the store will take them back for exchange. Got nothing to lose right?
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