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Modular engines are very sensitive to spark plug design. It seems users have the best luck with the recommended Motorcraft plugs. A few users have had good things to say about the Champion one piece design and the Bosch, but most still recommend Motorcraft.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
Stay with MC or autolite.
