Introducing a Magnetic Pick-up with the Amplifier integrated into the Distributor for simplified installation. Offers a smooth advance curve commencing at 1,000RPM, culminating in 18 degrees at 2,400 RPM with 10 degrees of Vacuum Advance. Comes equipped with an O-Ring. Requires a Bosch Blue or similar hi-energy coil (3.4 ohms primary/12k ohms secondary) with an inbuilt resistor. If your coil lacks a built-in resistor, an external ballast resistor can be used between the power source and distributor.