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The spark plug debate

Old 12-23-2016, 07:01 PM
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Default The spark plug debate

Stock or aftermarket which is better some say its better to stick with ac delco ?
Old 12-24-2016, 02:47 AM
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I would always stick to AC Delco when running 91 or lower octane and N/A on a relatively stock engine, aftermarket depending on boost, compression and fuel.


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