MSD Pro-Billet Cam Sync Distributors are available with a non-magnetic sync pickup and a version with a Hall-effect switch. Both have an adjustable sync pickup to meet ECU requirements (up to 60° BTDC), which fires fuel injectors in the same order as the engine's firing order. This synchronization system requires a sync signal to know when the number one cylinder is firing and is used in high-performance applications. Cam Sync Distributors are housed in CNC-machined 6061-T6 billet aluminum for strength. Chevy models include a slip collar, iron gear, and adjustable rotor.