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post #1 of 4 (permalink) Old 07-03-2012, 01:22 PM Thread Starter
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Garage
Spark Plugs?

Performing my 20K mile service and was curious what type of plugs y'all are using if not replacing them with OEM?


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Last edited by brhodea; 07-03-2012 at 01:25 PM.
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post #2 of 4 (permalink) Old 07-03-2012, 01:58 PM
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post #3 of 4 (permalink) Old 07-03-2012, 04:05 PM
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OEM plugs are just fine. Fancy high priced spark plugs won't give you anymore performance gain IMO. Your stock plugs are probably fine with just 20,000 miles on them, look at how often you change the auto spark plugs.


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post #4 of 4 (permalink) Old 07-19-2012, 10:33 PM
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One thing to remember when using aftermarket plugs on newer HD's is that they need to be 6 ohm resister plugs like the HD ones.

Why? The anti knock provision to protect the motor is based on the resistance in the combustion chamber and needs a resistor plug to make it work correctly.


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