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Racing Plug, 10mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Non-Resistor, Removable Terminal Nut, Surface Gap, .043" (1.1mm) Gap, Heat Range 11
Racing surface discharge plugs may be necessary in high compression applications or when valve/piston clearance does not allow for a ground strap and a retracted tip plug is not appropriate due to insulator/tip exposure. While they are nearly immune to preignition, they can be susceptible to fouling when used in colder applications. NGK surface gap plugs are hand made in Japan and constructed to withstand the most extreme racing environments. |
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= ultimate class
= premium class
= super class
= regular class
