Ford 351W Sync Plug 'S Cam Sync Plugs Install In Place Of A Traditional Distributor To Drive The Oil Pump And Provide A Cam Sync Signal When Running A Holley Efi, Or Other Aftermarket Sequential EFI System Requiring A Cam Sync Signal MSD IgnitionMSD's cam sync plugs are the perfect solution when running an aftermarket sequential EFI system with coil per cylinder ignition. The cam sync plug installs in place of a traditional distributor, providing a hall effect cam sync signal needed for the EFI system to reference the # 1 cylinder. For wet sump applications, the plug also drives the oil pump. MSD's cam syncs are plug and play with Holley EFI systems and can easily interface with most