Go to your local auto parts centre. Ours are at least 50% cheaper than the chandler. Only downside is as you've not bought it from a marine shop it's not a marine Plug :whistling
make sure that when buying cheap ones they are the radio suppreson type - i know that ngk ones have a 'z' as part of the code and are three times the price! without that your radio will whistle and buzz in time with your engine revs!
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