Spark Plugs

[Bones84]

I recently installed a cold air intake, full length headers, MSD Coil packs and Taylor 8.2mm plug wires on my 03 5.7ltr. now I want to replace my spark plugs. Anyone have any good ideas? Any help would be greatly appreciated. Thanks.

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[HemiLonestar]

SPRE14MCC4 (x16). Why'd you spend all that money for MSD coils (especially those style coils) on a stock engine?

 

[Bones84]

SPRE14MCC4 (x16). Why'd you spend all that money for MSD coils (especially those style coils) on a stock engine?

Hell I only paid 280 for the set of 8. It was just as much as stock one's. They were actually cheaper than the stock Mopar coils.

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[HemiLonestar]

Used then, I take it lol?

 

[HemiLonestar]

Or the cheaper street fires?

 

[Bones84]

Or the cheaper street fires?

Nope not used. A friend brought them about 2 months ago then rolled his truck and totally destroyed it. So he sold them to me

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[HemiLonestar]

Nope not used. A friend brought them about 2 months ago then rolled his truck and totally destroyed it. So he sold them to me

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Good score

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[Bones84]

Nope not used. A friend brought them about 2 months ago then rolled his truck and totally destroyed it. So he sold them to me

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No they are the MSD 82568 Blaster Coils.

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[Bones84]

Good score

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What about the Bosch 9654 Iridium plugs?

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[HemiLonestar]

What about the Bosch 9654 Iridium plugs?

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The 3rd gens (03-08) tend to behave better with OEM style coppers (like the p/n I gave you, in this case Champions). People have had mixed results trying platinum and iridium plugs, ranging from just fine to misfires. You have to buy 16 of them, so you have a decision to make lol.

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[Fitz-0518]

^^^Fully agree. I tried what "I thought" would be better plug in my 03 5.7. Wrong. Put in the OEM spec plugs and she ran perfect.

 

[Bones84]

^^^Fully agree. I tried what "I thought" would be better plug in my 03 5.7. Wrong. Put in the OEM spec plugs and she ran perfect.

I knew my gut was right! Thanks for the info guys.

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[Bones84]

The 3rd gens (03-08) tend to behave better with OEM style coppers (like the p/n I gave you, in this case Champions). People have had mixed results trying platinum and iridium plugs, ranging from just fine to misfires. You have to buy 16 of them, so you have a decision to make lol.

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I appreciate the help. This is my first Hemi and i just want her to run like a Hemi is known for.

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[brownie289]

It's time for plugs on my truck. From what i have been reading its copper ones that are OEM on a 2006 5.7 Hemi?

 

[HemiLonestar]

 

[Karlsweg]

Yup cooper Champions

 

[PerfectCreature]

My father and I installed NGK iridium plugs thinking they would be better in his 06. The truck did not run so well and we ended up replacing them with the Coppers, and it was a huge improvement. Restored quite a bit of power. I would go with the copper