Pro-Billet Black Chevrolet V8 Distributor. This is MSD’s most popular performance distributor! The housing is machined from a billet of 6061-T6 aluminum on a state-of-the-art CNC machine producing exact tolerances. Modified blocks can also take advantage of the O-ring seals to help maintain proper pressure. For high rpm stability, a. 500 steel shaft is supported by a sealed ball bearing and a long sintered bushing. This shaft also receives a QPQ coating for friction reduction and resistance to corrosion. Different springs and stop bushings are supplied so you can tune an advance curve to match your application. NOTE: Must be used with an MSD 6, 7, 8 or 10 Series Ignition. Supplied with a Cap and Rotor. Slip collar: No (MSD 85561 has a slip collar). Computer Controlled Compatible: No. Drive Gear Material: Iron. Distributor Rotor Rotation: Clockwise. Housing Material: Black Anodized Billet Aluminum. To prevent any delays with your order you should watch for the following common issues. Addresses that only have a PO Box can cause long delays and almost always result with having to credit/cancel the order in the end. If the ord er requires multiple packages someone will need to sign for each one. Some items are not combined due to size or weight such as crankshafts, torque converters, radiators, cylinder heads, etc. Powered by SixBit’s eCommerce Solution.