A surface gap plug provides exactly what its name describes - a gap at the surface of the combustion chamber. The gap is an annular configuration. The center electrode and insulator tip operate extremely cold (no heat rating) and are therefore, nearly impervious to pre-ignition. However fouling deposits are always present and cannot burn away. Product Features:Power tip X does not use side ground electrodeNo need for indexing of spark plugNo gap setting to adjust or monitorPower tip X reduces the volume of combustion chamber for increased Compression Ratio
