Replacement Black Cap for 9437-B Distributor Only

All new featuring a Magnetic Pick-up with the Amplifier attached to the Distributor for All-In-One ease of installation. Features a smooth advance curve that starts at 1,000RPM and has a total of 18 degree @ 2,400 RPM with 10 degree Vacuum Advance. Supplied with O-Ring installed. Requires a Bosch Blue or other hi-energy coil (3.4 ohms primary/12k ohms secondary) with built-in resistor. An external ballast resistor may be used between power source and distributor if your coil does not feature a built-in resistor.