Spark plug indexing won't make much of a difference in your average stock car, but it can have a noticeable impact in high-rpm performance builds.

Spark plug indexing sometimes is necessary to avoid side-electrode contact with high-dome pistons. Moroso offers different thickness spark plug washer kits to do this. Some theorists claim positioning ...

As vehicles continue to advance, some automotive tools are starting to become irrelevant. Here's one that isn't as popular as ...

We may receive a commission on purchases made from links. When it comes to engine care 101, a spark plug replacement — also referred to as a tune-up — is an essential task. Spark plugs, as the name ...

Spark plugs break from overtightening, carbon buildup, or age. Do you know how to remove one safely? If not, this guide will come in handy.