Seller notes

These ACCEL performance spark plugs produce a larger spark for more power at high rpms. They improve throttle response and fuel economy and reduce fouling. Their purified Alumina insulator prevents arcing, and their machine-rolled threads protect heads. The double platinum electrode ensures a long life ACCEL's patented race proven spark plugs in a Shorty configuration. The overall length has been reduced ~3/16" to gain critical air gap between the spark plug boot and the exhaust manifold or head...

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