Racing spark plug lead incl. Racing spark plug. Not only does the red colour make the lead look fast, the construction is very -“race-like.” This silicone lead can be installed very easily and is resistant to heat and fuel. The spark plug seals very well thanks to its softer washer. Reduced resistance from the lead ultimately means a stronger spark. However, the yield is not as high as in the NARAKU "high output" coils. Fitting requires that the old spark plug lead be unscrewed and the new one screwed-in in its place.