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Spark Plugs


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NGK are good, no reason to go for a cheaper brand. Spark plugs may seem to be a simple device but reality is that the quality of them matters quite a bit. Make sure that you get the correct model and gap on them.

 

And when changing spark plugs - make sure that you get the correct thread length and size by comparing new and old before trying to install the new ones.

 

Also keep track of the old plugs so you know which cylinder it came from and compare them. If one of them looks a bit "off" compared to the others then it's a sign that you have a potential problem in your engine. The plugs are one of the best indicators of the health state of the combustion chamber.

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OE is NGK. Subaru used NGK Platinums from the factory, I use NGK Iridiums because they last forever and have a better quality spark.

 

i wasnt aware what the oem supplied was, just went into the local speed shop and looked up the p/n in the book and bought that.

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