MSD Ignition 85555 Black Pro-Billet Distributor SBC BBC Chevy (REQUIRES MSD Box)

**MSD SBC BBC Pro Billet Aluminum Black Distributor Small and Big Block GM 85555** Distributor Model or Series: Pro Billet Make: Chevy Engine: 262-400, 396-454 Trigger Type: Magnetic Advance Type: Mechanical Cap Style: Male/HEI Cap Color: Black Housing Material: Aluminum Housing Finish: Black Anodized Requires Ignition Box: Yes Distributor Shaft Diameter: 0.500" Distributor Gear Material: Iron Cap Diameter: 4.940" Compatible with Computer Control: No Rotation: Standard Shaft Material: Steel Fixed Collar or Slip Collar: Fixed Collar Includes Ignition Coil: No - CNC machined billet aluminum housing and billet aluminum base - Advance plate and weights are fine blanked from chrome moly steel - QPQ coated for friction reduction - QPQ coated polished steel shaft - guided by sealed ball bearings - Will Not Accept Vacuum Advance Canister - Must Be Used with An MSD Ignition Control - Supplied with HEI style distributor cap/rotor (accepts Cap-A-Dapts) - O-ring seals can be installed for oil press. control (Mods only) - Special oil tract improves lubrication to the dist./cam gear - Nylon pads ensure smooth operation of the advance weights - Advance weight pins are staked and tig welded to the plate - Mech. advance assem. can be locked out for crank trigger systems The housing is machined from a billet of 6061-T6 aluminum on a state-of-the-art CNC machine producing exact tolerances. 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. A precision machined reluctor is attached to the shaft which triggers the magnetic pick-up mounted in the housing. This high output magnetic pick-up is the most accurate way to trigger your ignition. Plus, with no moving parts to wear or adjust, the pick-up is maintenance free! Just above the pick-up is MSD's adjustable mechanical advance assembly. Different springs and stop bushings are supplied so you can tune an advance curve to match your application. Must be used with an MSD 6, 7 or 8-series ignition.

• Type: Distributor
• Brand: MSD Ignition
• Manufacturer Part Number: 85555