There are many components in a car that help it run. It's not just the engine doing all the work, and it would be useless if there wasn't anything there to ignite the air/fuel mixture that causes the ...

For the average stocker in good running condition, spark plug selection is a cinchchoose whatever brands on sale, look up the plug part number in the catalog, and go down the road. At the opposite ...

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 ...