Teflon coated Viton “O” Ring seals tightly on the spark plug insulator. Because the voltage necessary to “flashover” the spark plug insulator is increased, spark plugs will operate at larger gaps that previously resulted in plug failure.
Greatly reduces spark plug cost by permitting the use of top threaded spark plugs instead of shielded spark plugs.
High alumina ceramic insulator prevents dielectric breakdown.
May be used with CetraTM leads or conventional shielded leads.