Please choose your item carefully using the below drop box, as some items may not represent the picture – if you have any questions please feel free to contact us before placing your order
Ideal for high-performance and boosted engines, the NGK R5671A‑10 delivers consistent spark and durability under extreme conditions. Crafted with a pure copper core and nickel-alloy electrode, this racing plug features:
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Heat Range 10 — designed to run 3–4 steps colder than stock plugs, ideal for high burnout conditions like nitrous, turbocharged, or supercharged engines
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M14 thread & .750″ (19 mm) reach with a 5/8″ hex — standard fit for many performance motors
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Preset .020″ (.5 mm) gap with V-groove design — improves ignitability and throttle response
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Copper-core insulator aids heat dissipation for longer life and stable performance
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Trivalent plating & cold-rolled threads for corrosion resistance and easier installation/removal
Perfect choice for drag racing, circle-track, boosted LSx engines, and other high-output applications demanding cooler plugs to prevent pre-ignition.