For hot rodders, spark plugs are often nothing more than inspection tools that reveal whether an engine is running too rich, too lean, or just right. Street guys look for a nice tannish-brown tint on ...

A spark plug is a device that delivers electric current from the ignition to the combustion chamber of an engine to ignite the compressed mixture of air and fuel. All motorcycles, including those from ...

If there was one thing our Continental Tire Presents Mustang360 Week to Wicked S197 Mustang could take advantage of, it’s a hotter spark with the addition of the supercharger setup. To help get ...

All things lead to the spark plug. You can spend all the money you want in fancy intakes, cylinder heads, or engine management, but if you're not paying attention to the most important step in the ...