NGK Spark Plugs 1643 Spark Plug - LKR7E. 653 1643 Spark Plug - LKR7E. These Spark Plugs from NGK Spark Plugs are designed to withstand carbon buildup and pre-ignition making them perfect for your ratchet and cable ignition. To guarantee this ignition the NGK Spark Plugs Spark Plug is outfitted with high alumina ceramics which provide better heat transfer and electrical insulation than regular spark plugs. Also the patented triple gasket sealing process eliminates the possibility of combustion gas leakage greatly reducing the possibility of a poor ignition. Yield last long enough to get you home tonight. Put the NGK Spark Plugs 1643/3000.653 1643 Carb Spark Plug in your classic ride to see the difference firsthand. Features of NGK Spark Plugs 1643/3000.653 1643 Spark Plug - LKR7E Designed to operate over a much wider heat range than ordinary plugs Resists carbon buildup and pre-ignition High alumina ceramics for better heat transfer and electrical insulation Solid copper core and nickel tipped electrode provide a longer plus life Patented triple gasket sealing process eliminates the possibility of combustion gas leakage Package Contents: NGK Spark Plugs 1643/3000.653 1643 Spark Plug - LKR7E NGK Spark Plugs 1643/3000.653: 1643 Spark Plug - LKR7E