Superior Materials. NGK Iridium IX Performance Spark Plugs feature a copper core electrode for its superior conductivity and an iridium tip (which is 6X harder than platinum) for it's extremely high melting point, perfect for keeping your Mustangs high-performance engine running at it's peak. And as an added bonus the Iridium IX plug features Trivalent Metal Plating for it's superior anti-corrosion and anti-seizing properties.
Application. This set of eight (8) One Heat Range Cooler NGK Iridium IX Performance Spark Plugs are specifically designed as an upgrade for nitrous or force inducted 2011-2013 GT and BOSS Mustangs equipped with the 4 valve 5.0L Coyote engine.
Mustang Fitment: 2011, 2012, 2013 Details >>