Butler Performance Inc. - Dual Sync / Hyperspark (EFI Ready)

Dual Sync Sensors generate two signals, one for crank and one for cam. Using this setup allows for individual timing control when using ignition boxes. These distributors have what is called a "Hall Effect" sensor. In simple terms, the Hall effect is used to detect the position of a rotating part in the engine and then send a signal to the ignition coil to generate a spark at the right time. These are the best distributors for EFI. They provide precise timing control and noise immunity.