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whats the best spark plug for our cars?

basshead42

basshead42

New member
I have the NGK iridium 2 ranges colder. Are these any good? And with these plugs, how long till i change them out? I always see people using Autolite 103 or 104's. Whats the difference?
 


Different brand. They are both a copper plug. I personally use autolites. With any copper plug being on a superchargd application you can plan on changing them every 6-10K miles.
 
Your probably due soon. Although I have never put those in any of my cars. No reason really. Just more expensive I guess.
 
yea i was just wondering. Lately when my car is at its peak temperature, and at WOT the engine spudders and i get thee 300 random/multiple misfire code. U got any ideas what it could be?
 


Iridiums on a boosted motor aren't the best route...just get some Autolite's...I'd say with your mods get 104's. If you ever go cammed or IC'ed then 103's.
 
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