The modern HEMI V8 isn't a hemi engine in the true sense of the word, and it uses two spark plugs per cylinder instead of one ...

If you consider your spark plugs little more than disposable engine parts to be replaced for every event or two, you're missing out on a valuable engine-tuning tool. Not only can the correct plug ...

So you've pulled the spark plugs from your car, motorcycle, or nitromethane-powered phone charger, and they seem dark. Sure, ...