The Denso Iridium Long Life plug, which extends work life in high compression lean engines, is fast becoming the standard for today's high-tech engines. Employing a revolutionary new 360° laser-welding process, Denso has created a spark plug unlike anything on the market today.

NGK Industrial Spark Plugs push the limits of performance and innovation, bringing the most advanced technology to today’s high-efficiency engines. From the high-tech Ruthenium HX™ to the industry standard OE-style spark plugs, NGK drives the future of spark plug engineering.

Precious Metal Electrode features separate Stitt Spark Plugs from the competition. Stitt supplies its specialized multiple electrodes, long life spark plugs to stationary gas engine manufacturers for original equipment installation, and for use in large stationary industrial engines fueled by natural gas.

You never forget your first Champion. Champion Industrial plugs are engineered to keep industrial equipment running strong. Designed with precious metals, F.I.S.S resistor technology, and Hot Lock, our plugs are able to withstand today's high-temperature, high-load service environments.