Iridium spark plugs for 2013 1500 5.7 longhorn

yount79 · Apr 25, 2015

Has anyone been running iridium plugs? My truck is due for spark plug change soon and I plan to do it myself. Just don't wanna go with factory plugs and change em again in another 30000 miles. Did some research and got a lot of mixed opinions on iridium ones. All I want is longer service life and reliable performance. Anyone???

SyN · Apr 25, 2015

I have read--->Iridium plugs are a good match for the Hemi design.

SlowRoller · Apr 25, 2015

Ran Autolite XP's (Iridium enhanced) in the 09 for 40k with no issues. (traded truck in on a 14) Actually have another 16 on the shelf waiting to go in the 14 someday.
Dual platinum's or other Irids may last longer than the XP's as XP's are marketed as 'performance' plugs and the ground strap has no 'precious metal' treatment.
I've been installing fine wire plugs into all my cars/trucks/toys for quite a while now. I really don't see myself ever going back to 'regular' plugs anytime soon.

yount79 · Apr 25, 2015

Thanks for the replies guys! I have read that Autolite's quality is kinda hit and miss though. Is there any NGK iridium plugs that I can run for the hemi? Searched their website and nothing came up... sigh

coleflo · Apr 25, 2015

I thought the change interval for the '13 and up Hemis was 100k.?.?.

yount79 · Apr 25, 2015

coleflo said:
I thought the change interval for the '13 and up Hemis was 100k.?.?.

No. Called the dealer today and confirmed that I have cheap ass Champion nickel plugs in mine. I think '14+ have NGK double platinum plugs which are good for 100k. My truck was manufactured in May 2013

yount79 · Apr 25, 2015

So just bit the bullet and ordered Autolite XP5325 iridium plugs from Rock auto. Hopefully my Hemi will like em

Nashman15 · Apr 9, 2018

Did you try the iridium plugs? Any issues?

Wahrsuul · Apr 10, 2018

Guessing from the date on the OP, that he's not around anymore. From everything I've read, some time in '15 is when FCA went to the different coils/long life plugs. Everything before has the coppers, and the Hemi doesn't seem to like anything else. I haven't heard of anyone swapping out the early coils with the later ones, but I'm guessing it could be done.

MarshRam · Apr 10, 2018

Wahrsuul said:
Guessing from the date on the OP, that he's not around anymore. From everything I've read, some time in '15 is when FCA went to the different coils/long life plugs. Everything before has the coppers, and the Hemi doesn't seem to like anything else. I haven't heard of anyone swapping out the early coils with the later ones, but I'm guessing it could be done.

I believe they made the switch in plugs sometime with the late production of the 2013 models, with early production in that year having copper. I have read you can go from copper to iridium if you change out the coils.

crackerjack1957 · Apr 10, 2018

These are NGK iridium plugs for 2014.
https://www.moparpartscorp.com/oem-...9MTUwMCZ5PTIwMTQmdD1zcG9ydCZlPTUtN2wtdjgtZ2Fz

These are Champion copper plugs for 2012.
https://www.moparpartscorp.com/oem-...9MTUwMCZ5PTIwMTImdD1zcG9ydCZlPTUtN2wtdjgtZ2Fz

And of course the 2013 could be 1 or the other.

# SP143877AA sometime in 2011 or so, which was good for 100K. This plug has been discontinued and replaced by the SP143877AB.

Iridium spark plugs for 2013 1500 5.7 longhorn

yount79

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SyN

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SlowRoller

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yount79

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coleflo

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yount79

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yount79

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Nashman15

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Wahrsuul

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