Whats the best spark plug and wire comboto run in a 2004 5.7 hemi ?

 

I'm partial to NGK. Others swear by Champion. The consensus is copper, not platinum. BTW, there are sixteen of 'em, not eight as some dealers will tell you. Taylor makes good plug wires as does MSD. If you decide to use 8.2mm or larger, they apparently won't fit in the loom on top of the engine. You can get "shorties" that will make the engine bay look a bit neater.

 

I like NGK in bikes and Hondas. Never tried them in a Dodge. I do however like Champions in Dodges. Seems like they are one of the better choices.

 

I've bought a fair number of Champion plugs -- never bought a good one. On the other hand, I've had a larger number of NGKs and a few Bosch with never a failure.

 

I've not heard many good things about Bosch plugs at all. I'd stay far far away from them.

 

I've read that about the +2s and +4s The ones I bought were a very long time ago.

 

I ran the Bosch plat. in my K cars for about 9 or 10 years. never had anytrouble from them. I did have one mech. tell me that they would crack the head becouse of the excess heat, that was after I had used them for 5 years.. NTS I told him to go **** up a rope..
So for in my 4.7 im useing stock replacements from the dealer, the seem to do a good job & my parts guy get me a good deal on them.

 

I run with the NGK iridiums.
In 30,000 miles, not one problem or code.
Excellent plug and bear in mind, I run most of the time with LPG.
Al.