MSD Ignition 85551 BBC/SBC Pro-Billet Distributor, Male/HEI, Magnetic Trigger

$369.95
MSRP: $412.00
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SKU:
MSD85551
MPN:
85551
UPC:
85132855513
Condition:
New
Weight:
5.32 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

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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 maintenancefree! 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.

Features
  • CNC machined billet aluminum housing and billet aluminum base
  • Will not accept a vacuum advance canister
  • Must be used with an MSD Ignition Control
  • Supplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)
  • O-ring seals can be added to modified blocks to improve oil pressure control
  • Special oil tract improves lubrication to the distributor and cam gear
  • Nylon pads ensure smooth operation of the advance weights
  • Advance weight pins are staked and tig welded to the plate
  • Mechanical advance assembly can be locked out for crank trigger systems
  • Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
  • Polished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushing
  • Maintenance-free magnetic pickup and precision reluctor create stable trigger signals
  • Easy-to-adjust mechanical advance with supplied springs and stop bushings
  • No CARB Exemption Order Number
  • Computer-Controlled Compatible:
    No
    Trigger Style:
    Magnetic
    Advance Type:
    Mechanical
    Ignition Box Required:
    Yes
    Cap Style:
    Male/HEI
    Mechanical Tach Drive:
    No
    Slip Collar:
    No
    Gear Included:
    Yes
    Distributor Gear Material:
    Iron
    Distributor Gear Rotation:
    Standard
    Distributor Cap Color:
    Red
    Housing Material:
    Billet Aluminum
    Housing Finish:
    Natural
    Marine Use:
    No
    Quantity:
    Sold individually.
    Notes:
    Distributor is 6.9375 in. tall from engine to top of distributor cap.
    Make:
    Chevrolet
    Engine Family:
    Chevy big block Mark IV
    Engine Sizes:
    6.5L/396-7.4L/454
    Years:
    1966-1980
    Engine Family:
    Chevy small block Gen I
    Engine Sizes:
    4.3L/265-6.6L/400
    Years:
    1955-1980

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