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https://ppflco.com/products/pre-gapped-ngk-iridium-spark-plugs-for-mustang-ecoboost-ngk6510-ltr7ix-11?_pos=1&_sid=e9ccf0dbf&_ss=r
NGK Iridium Spark Plugs for the Ecoboost Mustang - 1 step colder, pre-gapped to Purple Drank Tuning's specifications. These are the NGK LTR7IX-11 (6510).
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