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Cycle Performance Spark Plug Indexing Washers for 12mm Plugs Product Details Fits 12mm spark plug threads Allows the tuner to precisely index spark plugs for maximum fuel burn Kit includes 15 washers: five .040" thick five .050" thick five .060" thick Made in the USA Fit GuideModelSpark Plug Indexing WashersCountry of OriginUSAQuantity15Size12mm Shipping We guarantee your satisfaction, that’s why our team works hard to get your gear to your door as fast as possible. All items you purchase from...

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