Racers know to go “Pro” with their distributor. Monroe Racing Pro Series distributors feature a screw down or hook in cap, with no maintenance magnetic pickup and you get a set of stop bushings and springs inside the box. You can count on quick starts with every turn of the key and consistent acceleration through the entire RPM band up to 10,000 RPM thanks to the sealed ball bearings. **(This application requires an external ignition control along with external coil)**. Installation is simple with the two wire hookup.