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  #11  
Old 04-24-2012, 08:06 AM
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I googled the part number and it says it's a Mopar plug Here's the link to the first place you can buy them in my search http://www.moparpartsoverstock.com/p...P143877AA.html
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  #12  
Old 04-24-2012, 09:35 AM
AirborneSilva AirborneSilva is offline
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So what's the advantage to these plugs that I should pay almost $14 a piece for them?
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  #13  
Old 04-24-2012, 10:02 AM
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Quote:
How is there 16 plugs in our trucks when there r only 8 cylinders? I's this only a dodge thing or somethin cuz my past GM trucks only had 1 per cylinder which was 8 plugs.
The 5.7L and the 2008+ 4.7L have 2 plugs per cylinder.

The 100,000 miles plugs are usually and most likely iridium. It is superior to copper as it doesn't break down easily, it technically provides a "better" spark since it is a smaller, harder metal, and it has less resistance. I don't see why going to an iridium would be anything but good or at least equal.

I've heard that platinums are not good, because they cause too much resistance. I don't know why anyone would use anything other than either copper(if you're cheap) or iridium(if you're not cheap) anyway. No point in using anything in between IMO.

Does the 5.7L use the same plug in all 16 holes? Or is it a different plug on each side of the cylinder?
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Old 04-24-2012, 10:20 AM
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Quote:
Originally Posted by snrusnak View Post

Does the 5.7L use the same plug in all 16 holes? Or is it a different plug on each side of the cylinder?
My 2005 used the same plugs.
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Old 04-24-2012, 10:45 AM
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^thanks for the info
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Old 04-24-2012, 02:47 PM
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I believe one of the reasons you may often now find more than one spark plug per cylinder is due in part to the manufactures trying to improve on fuel economy to meet govt mandates.... Having additional spark plugs, give a more complete burn of the fuel air mixture in each cylinder, which should produce better combustion, thus improving gas milage and performance.... Chrysler is not the only company using multiple spark plugs per cylinder
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Old 05-18-2012, 10:12 PM
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I ordered and just received these 100K mile, Police Package Hemi spark plugs...Here is what they really are: NGK IR 11, Iridium.... Plug number is ILZFR5E 11 14MM, torque required is 18.0-21.6 with Aluminum heads or 18.0-25.3 Foot LBS with Iron Heads, per NGK website.... My 2009 5.7 Hemi Ram calls for a spark plug gap of .043.... A quick check shows that the plugs came gapped at about .040, so I will have to slightly open them up to the .043 gap. I will be installing them in the next couple of weeks when time and weather permit.....I expect they will work out just fine, as they came directly from MOPAR, and all my cross checking shows all the late model 5.7 hemi's all use the same plugs, no matter if it's in a car or truck
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Old 05-18-2012, 10:17 PM
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as a side note: I guess any of the new Bosch, Autolite, or NGK Iridium plugs, now made for the Hemi, should work as well as the MOPAR NGK IR Police Plugs, and are probably alot easier to currently get your hands on....Took me about 3weeks to receive the MOPAR ones
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Old 05-28-2012, 04:08 PM
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Just installed the new Police Package 100k mile Iridium Plugs, took me about 4 hrs total. Made sure they were gaped to .043, came gapped at about .040. The drivers and passenger side plugs closest to the firewall, were a little bit challenging, but other than that, not a really a big deal to change, I'm sure it will go faster next time, as this was part of learning experiance.. I applied some anti seize to the new plug treads, to help avoid any future problems with my Aluminum heads...and I used some dielectric gease, inside the coil boots...... Results: My idle is noticeably smoother, and wide open acceleration seems very strong.....Overall very happy, and I should be good for quite some time without having to address this every 30k miles now....My dealer wanted $200.00, to install my plugs, or $250.00 if they installed their standard 30K mile plugs..... I'm happy I chose to tackle the issue myself, and saved my money.....you will need a 5/8 spark plug socket, some universal joints and some extensions, a 10 MM socket and small box wrench for the coil packs...a 3/8 drive flexable rachet handle is a big plus, a zip tie or two as you have to move the wiring bundle, it's also easier if you release the heater hoses from their plastic clamp on the firewall and rotate the clamp up and out of your way on the passenger side.
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  #20  
Old 06-01-2012, 02:02 AM
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I work at a Police Department and we just took delivery of a 2012 Charger with the Hemi, I will try to get some info on the plugs for ya.
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