There are hundreds of different spark plug types designed for different engines as well as specific applications. The two main ones are the standard tip and extended tip.

    The longer tip gets the spark kernel started further into the center of the bore for a more complete combustion process. This is also achieved with the better aftermarket cylinder heads on many available engine applications. The newer heads position the spark plug location closer to a more optimum location.

    There are also specially designed spark plugs that are supposed to increase the spark kernel size. The larger the spark kernel that is generated by the spark jumping the electrode gap, the more complete burn, the better power and efficiency and the smoother the car will run for longer periods of time. These specially designed plugs will have multiple angles that allow the spark to find the easiest path as well as getting the spark kernel out from under the ground electrode which can quench the kernel size limiting it's size and expansive growth.

    Of these plugs, there are those that work, those that are hype. Use common sense, don't believe all the marketing.

    One thing to be wary of is plug's material.

• The fine-wire gold plugs have the best power, but have a shorter life, which requires short replacement intervals.

• The Platinum plugs are only good for longevity. This has to do with the material of the cylinder head and engine block and the plugs ability to properly ground.

    The Bosch or NGK Platinum plugs usually work best.