For those searching for proven race performance in their streetcars, the MSD Street Pro-Billet with Vacuum Advance Distributor is the best option. A vacuum advance canister saves money, while the tested MSD mechanical advance allows you to tailor a timing curve to your specific requirements. Inside, a QPQ-coated large steel shaft rides in a sealed ball bearing at the top of the distributor, with an extra-long sintered bushing at the bottom, for minimal friction. This combination maintains shaft stability, resulting in precise spark delivery at any rpm. The MSD Ignition Control, which delivers the intense sparks to the coil, is triggered by a magnetic pickup on the Street Pro-Billet Distributor. This pickup is incredibly precise and requires no adjustments.