Pencil Coil

One coil per cylinder allows the coil a longer time to accumulate a charge between sparks, and therefore a higher energy spark. This is a very popular design and is easily adaptable to different engine layouts.

Plug Top Coil

The plug top coil is mounted directly on the spark plug and each unit is powered separately to allow the engine to independently manage each coil. Plug top coils are also used where a spark plug well diameter is too small to allow for a pencil coil (22mm).

Rail Coil

Are 4 or 2 coils mounted together that fit directly on top of the engine. In the four coil configuration they operate in a similar way to pencil and plug top coils. In the 2 coil configuration they operate a wasted spark system where each coil links to a pair of cylinders, normally 1- 4 and 2- 3. This means that one plug will be sparking during the end of the exhaust stroke while the other plug fires at the usual time at the end of the compression stroke.

Coil Packs

These are near plug coils which normally operate the wasted spark system of 1 coil to 2 cylinders. The pack design can offer one of the highest energy densities to enable a mass reduction of up to 40 percent compared with conventional ignition coils. Integrated Coil & Wire set The ignition coil and wire set come as one complete unit. This allows for the coil to be placed away from the spark plugs because of lack of space or hostile surrounding while decreasing the chances of a poor connection between the coil and plug.