At 7,000 rpm, a spark plug ignites the air/fuel mixture nearly 60 times per second. Any one of those 60 sparks going amiss can at best be mildly annoying, and at worst cost you a race or an engine.

Sure, we all want to bolt on those shiny new gauges or that sweet set of wheels you've been saving up for, but I'm talking about the mundane chores like changing the oil, tune-ups, and that sort of ...