Description
NGK TR7IX Iridium Spark plugs are a heat range cooler than factory and are required for a boosted application. Recommended Spark Plug gap on most boost applications is .028-.032
-2011-2021 Ford Coyote 5.0L Engines (fits F-150 or Mustang)
-2011-2014 Shelby GT500 with 5.4L or 5.8L Engine
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