Spark plugs are one of those maintenance items that, along with things like brake fluid and thermostats, are easily overlooked but extremely important to your car's safety, longevity, and performance.

The Sultans of Spark (or S.O.S. for short) coil packs pack an amazing punch, putting out 40,000 volts - nearly a 60-percent increase over the 25,000 volts the factory packs produce. The increase ...