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In-Store Pickup Location

MSD Pro-Billet Distributors 85551

MSD Ignition 85551 - MSD Pro-Billet Distributors
  • Summit Racing - MSD Pro-Billet Distributors

    Summit Racing - MSD Pro-Billet Distributors

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Distributor, Pro-Billet, Magnetic Trigger, Mechanical Advance, Chevy, Big/Small Block, Each

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Brand: MSD Ignition

Manufacturer's Part Number: 85551

Part Type: Distributors

Product Line: MSD Pro-Billet Distributors

Summit Racing Part Number: MSD-85551

UPC: 085132855513

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

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.

CARB EO Number: D-40-39 (pdf)
To see a list of qualifying vehicles, enter CARB EO Number D-40-39

Emissions: California EO Approved

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

MSD 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 replaces the ball bearing at the bottom of Chevrolet models. TIG-welded on top of the polished steel shaft is MSD's accurate mechanical advance assembly. The weights are supported by nylon pads that allow the advance to operate smoothly throughout the rpm range.

For all-out racing, the advance mechanism can also be easily locked out. To accurately trigger the ignition, a high-output magnetic pickup is bolted to the base. This pickup produces a precise trigger signal that will never vary more than one degree at any rpm. A durable gear is installed for performance applications, and an MSD red cap with brass terminals and race rotor is supplied. They're available in standard and small diameter models for applications with limited clearance, and require the use of a separate ignition box such as an MSD 6, 7, 8, or 10 Series ignition.


Questions & Answers Ask a Product Question

Would you recommend this distributor for a 500hp stroked engine combined with the 6AL-2 and the blaster 2 coil for dragracing or is there a better one?

Asked by ALEXANDER on June 19, 2017


Thank you for your question. MSD Ignition 85551 would work well with your application.

Summit RacingSummit Racing Answer - August 02, 2017

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Required parts shows a 6AL box. Will this run fine with a 6A box (6200) on a Chevy 350 set up?

Asked by BILL on December 31, 2017


Yes it will work with a 6a

JIMMY from TX answered on January 11, 2018

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Will the gear on this be compatible with a blueprint 383 roller cam? Also, will this distributor work with Fitech EFI for timing control? Do I still need the ignition box for that application?

Asked by ANTHONY on November 22, 2017


Yes it will. No I already have a ignition box

DONALD from GA answered on November 23, 2017

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Will the gear of the 85551 work together with my Trick Flow Track Max Camshafts or do i have to replace it?

Asked by ALEXANDER on June 22, 2017


I would put a bronze gear on it!

TRAVIS from AL answered on June 26, 2017

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Some parts are not legal for use in California or other states with similar laws / regulations

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