MSDs Pro-Billet Pontiac V8 Distributor for Pontiac engines built for either street performance or hard core racing applications. Special features include a fully adjustable mechanical advance assembly. For all-out racing, the advance mechanism can also easily be locked-out. For stable timing, a high-output magnetic trigger pick-up is used to supply the ignition with a trigger signal. Additional stability is achieved via the 0.500 hardened distributor shaft that is supported by sealed ball bearings.