Holley EFI's plug-and-play dual-sync distributors give you the classic, traditional look of a distributor with all the benefits of modern electronics. Available for almost all popular engine platforms, they're a fast, easy way to provide timing signals to your ECU without having to bother with a crank trigger or cam pickup. They're designed especially for Holley EFI systems but fully compatible with other systems and perfect for sequentially fired fuel systems.