ACCEL's done it again with these DFI dual sync distributors. ACCEL DFI dual sync distributors are designed for engines using sequential-fire fuel injection that requires two signals--one for the cam, and one for the crank. All you need is the dual sync ignition adapter harness and a little installation time. ACCEL DFI dual sync distributors feature beautiful billet housings and an LED readout that allows you to sync up without expensive equipment. The adapter harness and large cap conversion (if desired) are available separately.