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2357 MSD BLACK Hall effect EFI Cam Sync Type
CHEVY CAM SYNC DISTRIBUTOR, HALL-EFFECT, STANDARD CAP
Use 8471 Bronze gear if Roller Cam
Hall-Effect sync pickup. Must be used with an MSD 6, 7 or 8-series ignition.
Some aftermarket EFI management systems fire the fuel injectors in the same order as the engine's firing order. These are called synchronization systems and are found in most high performance applications. These systems require a sync signal to know when the number one cylinder is firing.