MSD 85557 Pro-Billet Distributor for Chevy V8

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MSD designed this 85557 Pro-Billet Distributor for Chevy small block as well as big block V8 engines. The housing is CNC-machined from 6061-T6 billet aluminum to exact tolerances. For stability well over 10,000 RPM, a sealed ball bearing as well as a long-sintered bushing supports the .500" steel shaft. This oversize shaft has a QPQ coating for friction reduction as well as resistance to corrosion. TIG-welded on top of this steel shaft, the mechanical advance mechanism can easily locked out for all out racing use! The supplied springs and stop bushings allow you to tune an advance curve to match your application. Must be used with either an MSD 6, 7 or 8-series ignition. MSD 85557 Pro-Billet Distributor Features: Fits Chevy Small as well as Big Block V8 engines Distributor Cap Color: Black Housing Material: Billet Aluminum Trigger Style: Magnetic Advance Type: Mechanical Slip Collar: No Ignition Box Required: Yes Cap Style: Male/HEI Distributor Gear Rotation: Standard Distributor Gear Material: Iron Computer-Controlled Compatible: No Mechanical Tach Drive: No Marine Use: No CARB E.O. Number: D-40-39 From street cruisers to Top Fuel dragsters, MSD's ignition systems have been the industry leader for over 40 years. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems. Show more