MSD Pro-Billet DistributorMSD Pro Billet distributors share the same CNC machining techniques as the rest of the MSD distributor line. They feature a housing that's machined from high quality 6061 T6 aluminum for durability and show quality looks. Their oversized shaft receives a QPQ coating for friction reduction and corrosion resistance, with the added strength of two sealed ball bearings that guide the shaft accurately at well over 10,000 rpm. An extra long sintered bushing