News & Events

A look at some of the common connectors found in Holley EFI main harness along with their associated part numbers....

You asked. We listened. Our newest release is here—and it's built to make your digital dash upgrade easier than ever. The M.F. Digital Dash Adapter lets you install an aftermarket digital dash display while using your factory wiring. That means no cutting, no splicing, and no guesswork. Just plug...

Over the years, Holley has released numerous updates to their software. However, as time passes, some of the older versions become harder to locate. This section serves as a repository, providing a reliable resource for anyone in need of accessing older versions in a pinch....