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Factory gap is 0.044. Also (and most people will argue this point) stay away from plugs like the Bosch platimun 4 (with 4 fingers) or the 2's. NGK makes a great plug in both copper and platinum, copper is also factory, but I like the platimuns better muself (Bosch makes good plugs too, don't get me wrong, I have all Bosch wiring on my Galant) but stick with the factory gap for best performance. The ECU is calibrated for that specific gap, so don't get suckered into buying some high dollar irridium or platinum non gapped plugs that are suppose to give you a couple extra horses. They are a way of money! My 2000 Galant 2.4L is custom turbocharged and that was the first thing my mechanic did was through out my Boach platinum 4's and told me to get plugs with the factory gap!!!!

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16y ago

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