brandonf

I was just wondering, if you were to install the top of the line spark plugs for your car, do they actually improve performance?

Swonder67

Just sparkplugs, won't really make a difference.

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ric

stock ngk, platinum is a waste, iridium is a waste.

sparq

What do you mean, I thought you got + 10hp for each spark plug you changed? hahaha

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brandonf

So does it increase HP or not?

igo4bmx

no just helps if you have worn out plugs. you're engine will run smoother if you are replacing beat plugs. if you have one chamber firing, and then replace them all so they all work, i would consider that a gain